As of a couple days ago, you can sign up for this instance directly at mastodon.mania.systems instead of having to be invited. Still requires admin approval, but .. yknow. I don't sleep.
Nextcloud is now the same - directly register at docs.mania.systems for an account.
Working on making the same changes elsewhere where I can.
Mania Systems is a space for independent, underground, and non-traditional artists & creatives to share their work, meet each other, and collaborate. This mastodon instance is one community space we offer - a decentralized social network, run by the community, where you own your data and the content you post.