cosocial.ca is one of the many independent Mastodon servers you can use to participate in the fediverse.
A co-op run social media server for all Canadians. More info at https://blog.cosocial.ca

Server stats:

143
active users

Evan Prodromou

So, as far as I can tell from the thread, here are the reasons, in roughly descending order for importance from me:

1) Signal is Open Source
2) Signal does a better job encrypting metadata and other incremental improvements in security
3) People trust Signal much more than Meta
4) People want to show alignment with Signal more than Meta

I think these are pretty convincing. Thanks all who replied!