Here is a guide I made on how to change the character count on your Mastodon instance, I'm not the best at writing so feel free to tidy it up to make it more readable. https://github.com/Mike-Cole/nulled.red-meta/blob/master/change-character-count.md
Well, if you must ask...
nulled.red is an any-topic moderated Mastodon instance made by me, Ami. Hosted in Roubaix, France.
If you want to help keep nulled.red and my other projects up and running, feel free to donate with Patreon!. You don't have to do this, but It'll help out a lot. You can become a Patron here.