FLOSS.social was launched in the (now small) Mastodon signup wave at the end of March 2018, as a result of the #Facebook Cambridge Analytica scandal.
Since then, #Meta has shown little to no sincere interest in reforming their culture of abusing their users' human rights of privacy.
As a result, there is no reason to suspect they'll be any different if they join the #Fediverse, and our instance will respond accordingly.
https://en.wikipedia.org/wiki/Facebook%E2%80%93Cambridge_Analytica_data_scandal
Or, to echo #Threads own terms:
"A server may be added to our server blocklist if it doesn't comply with our guidelines for communicating with [FLOSS.social]. We'll block a server if it repeatedly or severely fails to meet our [Community Code of Conduct], including via admins or moderators."
Human rights matter.