This and keep subscribing to anything that interests you

Honestly is not a big deal. Some specific instance might start behaving like aholes because of corporate greed or anything else.

All they can do is take their specific communities down. The affected communities can always move to other instance (that is easier than changing to a different system all together).

Changing platforms will always be harder than just switch instance because you instance changed the rules on you.

If this checks out, they may be in disrespect of a bunch of privacy laws including GDPR.