That said, I'm not a social media user besides HN I guess.
My comment on the about page was that it needed more than 280 chars to communicate what the app is about - even the title + intro exceeds the limit.
If it is truly believed that 280 chars is enough to communicate an idea, then the about page should follow that philosophy.
I just wanted to give a bit of feedback as someone who reads them - and point out that on almost every twitter/bluesky submission to HN they are using ways to work around the 280/300 char limitations.
To play devils advocate - 500 also seems a bit arbitrary ;) If I were making a platform like this myself, I would go for a power of 2 that makes sense for storage/buffering. Maybe 1KiB including all meta, etc. You could comfortably fit a post the size of your about page, and all associated meta in that - even when serialised as JSON or something. I'd go from there and work backwards to come up with a size that has a real technical purpose.
Almost every twitter/x post submitted to HN has people labelling their posts as "X of Y" threads, using images as text, or using pro account posts.
You can see it yourself: https://news.ycombinator.com/from?site=twitter.com Ive just looked at 30 and each of them exceed 280 chars by far.
"Microblogs, for example on Twitter..." https://dictionary.cambridge.org/dictionary/english/microblo...
"Some popular social networks such as X (formerly Twitter), Threads, Tumblr, Mastodon, and Bluesky can be viewed as collections of microblogs." https://en.wikipedia.org/wiki/Microblogging