This is extremely true for modern social media sites. Normal news sites used to push their apps too, but I guess this fad has passed.

I’m out of the loop on this subject. I know Onedrive previously offered 15GB to free users, then strunk it to 5GB, but kept the larger amount to legacy users.

Have they made another reduction recently?

Lemmy taking over as a protocol would not be a bad thing, because by design it promotes the creation of multiple federated instances. At least the UI woukd be standardized, lowering the user friction in case he needs to migrate.