most of the instances are now down, and should be removed from joinplu.me

these are all down now amd should be removed:
[Hey.dou.bet](https://hey.dou.bet/)
[amplifi.casa](https://amplifi.casa/)
[Blog.Antopie.org](https://blog.antopie.org/)
[FédiQuébec](https://plume.fedi.quebec/)
[Palom.be](https://palom.be/)
[StemyPlume](https://plume.stemy.me/)
[Witch Academy](https://blog.witch.academy/)