glitched.systems is a community infrastructure, run by Abhiram, serving a close-knit group of users.
There's no real plan on opening up public registrations to any of these services at the moment, mostly as a way to reduce moderation overhead. However, if you know Abhiram personally, send him a message asking for an invite!
If you're a current glitched.systems user, consider donating to help keep the lights on. •ᴗ•