I mean, Meta can extract from the fediverse already. Having a federated instance doesn't really change that. It doesn't provide them deeper access than before. Theyre either federating due to EU policies on interoperability or trying to position themselves as the best instance in regards to the fediverse. There's a lot of clamour as to how great the fediverse is for users, now they can say "choose us, we're fediverse." Other instances need to show them the benefit of other instances and point out that they can have all the "benefits of Threads" (really just benefits of fediverse) without all the disadvantages.