1. It uses server infrastructure from #gafam
2. It's not #decentralized. Meaning if government (or whoever else) decides to cut signals connection to e. g. AWS servers, most likely no messages can be sent or received then.
3. It's based in the USA and therefore falls under "Five Eyes".
5. You can't use it without a phone number.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!