Laurie Vosshttps://zeitgeist.blue is a multi-social-network app that summarizes your feed for the last 24 hours to let you catch up with doomscrolling. Now with support for Mastodon!
Jan Lehnardt 
@seldo how can I make sure my posts are never used by this app to be sent to an LLM vendor?
@janl You would need to block me from following you, I suppose.
@seldo you personally or some app account?
(Note that this kind of stuff is not well liked here on mastodon, I got browbeaten into shutting down just a search engine that worked that way, let alone exfiltrate a timeline into an LLM provider)
@janl Me personally, and also anyone who uses the app. It's just a mastodon client, fetching the timeline. It looks like every other mastodon client.
@seldo yes I know. I’ve written about my experiences extensively: https://searchtodon.social/Adventures-in-Mastoland.html
Aurynn Shaw
neoluddite@aurynn @seldo @janl Surprise! "Just a Mastodon client", so he doesn't set one, I imagine it'll just use the default Next.js user-agent header: https://github.com/search?q=repo%3Aseldo%2Fzeitgeist%20headers%3A&type=code
It looks like it uses 'Zeigeist' as a client name when OAuth'ing, but that would only let you block its use on servers you control - people who follow you on other servers (or who you've DM'ed who use it 😬) still have full access to your posts:
https://github.com/seldo/zeitgeist/blob/2cb6c49581c51161f82e6c94804419609aad7c30/app/api/mastodon/auth/route.ts#L25
@neoluddite @seldo @janl Well, we'll do a PR for it.
Ideally, if we get a sufficient quantity of admins on board with blocking the UA, we can stop the spread of this kind of insipid techbro slopmongering.