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RevisionDojo is a YC-backed test prep company ($3.4M raised) that sells International Baccalaureate (IB) test prep. Over the past year, users on r/IBO sub-reddit have documented a pattern of unethical marketing practices:<p>*Astroturfing:* Coordinated campaigns where accounts pose as students sharing "cheatsheets" and "predicted exam leaks." Other accounts then upvote, leave supportive comments, and ask follow-up questions—creating the illusion of organic student excitement. Multiple threads have exposed this pattern [1][2][3].<p>*Paid fake posts:* High school students report being offered payment to write promotional Reddit posts [4].<p>*Pressuring critics:* Users who post negative reviews report being contacted directly by company representatives, told it's "a shame" they're posting publicly [5]. Critical comments receive coordinated mass downvotes [6].<p>*Soliciting copyrighted materials:* They use TikTok influencers and fake reddit posts to persuade students to sell them official IB exam papers, violating IB policies [7].<p>The r/IBO moderators are actively investigating [8].<p>These practices appear to be working great for them. Recently, they acquired OnePrep (oneprep.xyz), a free SAT prep tool that was already popular on r/sat. Since the acquisition, the same manipulation tactics have been deployed at scale: 150 Trustpilot reviews in a window of a few days [9], and widespread coordinated Reddit manipulation—multiple accounts posting "tips" that recommend Oneprep, coordinated upvoting, and fake enthusiasm in comments. The most prominent example was a 2,000+ upvote post removed by moderators for manipulation, but it's part of a sustained campaign across the subreddit.<p>*Sources:*<p>[1] https://www.reddit.com/r/IBO/comments/1p55qun/
[2] https://www.reddit.com/r/IBO/comments/1jsb00a/
[3] https://www.reddit.com/r/IBO/comments/1ohcohi/
[4] https://www.reddit.com/r/IBO/comments/1p55qun/comment/nqmhal3/
[5] https://www.reddit.com/r/IBO/comments/1my1ajx/comment/na94upv/
[6] https://www.reddit.com/r/IBO/comments/1my1ajx/comment/na8zvs4/
[7] https://www.reddit.com/r/IBO/comments/1mej900/
[8] https://www.reddit.com/r/IBO/comments/1my1ajx/comment/nagdkl5/
[9] https://www.trustpilot.com/review/oneprep.xyz
Hi HN,<p>I’m a former C++ dev turned Product Manager.<p>I’ve noticed many engineers struggle with the "politics" side of things when they become Leads. To help with this, I’m building a text-based simulator.<p>It is NOT an AI chatbot. It is a hand-crafted, branching narrative (logic tree) based on real experiences.<p>I just launched the first scenario: "The Backchannel VP."<p>The Setup: Your VP Engineering is bypassing you and giving tasks directly to your juniors, causing chaos.<p>Your Goal: Stop the backchanneling without getting fired.<p>It’s a short, specific puzzle. I’d love to know if you think the "Correct" path I designed matches your real-world experience, or if I’m off base.<p>Link: <a href="https://apmcommunication.com/scenario/backchannel-vp" rel="nofollow">https://apmcommunication.com/scenario/backchannel-vp</a>
Why - I got sick of apps abusing notifications on my Android phone. While the OS does give you the ability to switch off notifications based on channels, most apps either don't use it or abuse it intentionally. In my case, I live in a gated society that uses an app called MyGate to allow visitors, and the app intentionally pushes ads through the same channels since you cannot block them.<p>What - DoNotNotify is an app that logs all incoming notifications, and displays them grouped by app. It also captures the action behind the notification, which can be triggered from the app itself. From this log, you can create rules to whitelist/blacklist notifications from apps depending on their notification content. These filters can even be regex expressions, which allows for more complicated use-cases. The app ships with some pre-defined rules for popular apps like Facebook, Amazon, Instagram, Netflix, TikTok, Reddit etc.<p>Where - The website is at <a href="https://donotnotify.com/" rel="nofollow">https://donotnotify.com/</a>.<p>Would also like to call out that the app runs purely on your device, never communicates with anything on the Internet, and only requires notifications access to work. It is completely free, and there is no advertising or hidden gotchas.
Hi HN,<p>This is a small RISC-V emulator I’ve been hacking on in Emacs Lisp as a fun weekend project.<p>It started mostly as a way to better understand the RISC-V spec by implementing things myself, and also as an excuse to write more non-trivial Emacs Lisp. It currently focuses on RV32I and related basics, and is very much not optimized or production-ready.<p>If you’re into RISC-V, emulators, or just enjoy seeing unusual things built in Emacs Lisp, feedback and comments are welcome<p>Happy hacking!
I’ve always struggled with traditional habit trackers. Filling out boxes every day feels robotic to me, and missing one day ruins the whole aesthetic.<p>So I built Voronoi just to use it myself. Instead of a rigid grid, it uses organic shapes to visualize your year. Your consistency paints a unique map associated with your time, rather than just checking off a list.<p>I've been using it for a while and it actually helps me stick to things, so I thought I'd share it here. I added a few other little tools and features that I personally needed along the way, but I'll let you discover those on your own.<p>Hope you find it useful.<p>https://getvoronoi.com
Hi HN, I made OSS Sustain Guard.<p>After every high-profile OSS incident, I wonder about the packages I rely on right now. I can skim issues/PRs and activity on GitHub, but that doesn’t scale when you have tens or hundreds of dependencies. I built this to surface sustainability signals (maintainer redundancy, activity trends, funding links, etc.) and create awareness. It’s meant to start a respectful conversation, not to judge projects. These are signals, not truth; everything is inferred from public data (internal mirrors/private work won’t show up).<p>Quick start:
pip install oss-sustain-guard
export GITHUB_TOKEN=...
os4g check<p>It uses GitHub GraphQL with local caching (no telemetry; token not uploaded/stored), and supports multiple ecosystems (Python/JS/Rust/Go/Java/etc.).<p>Repo: <a href="https://github.com/onukura/oss-sustain-guard" rel="nofollow">https://github.com/onukura/oss-sustain-guard</a><p>I’d love feedback on metric choices/thresholds and wording that stays respectful. If you have examples where these signals break down, please share.