Yea agree, not a fan of "Meta". But I think limiting who can use federated networks kinda goes against the federated nature of such networks. What's next, we'll have a centralized blacklist of lemmy instances.
Yea fundamentally the same idea. Paaster does use more modern encryption algorithms and libraries. Privatebin also stores more metadata about pastes readable by the host.
Actually I did a Pros/Cons for Paaster compared to PrivateBin awhile ago here
https://github.com/privacyguides/privacyguides.org/issues/2015
Basically the TL;DR Modern encryption, doesn't expose metadata, modern design (svelte + asyncio python), pwa support, frontend / backend code separation & paste history.