honestly, i think only half-accepting them would be beneficial. it gives meta users a taste of the fediverse but locks them out of a whole bunch of cool stuff that they could have, if they just make an account on one of the instances that they already know because it's in the half that does federate. we just need to ensure we never repeat xmpp's mistake: meta users should never be a majority.

i'll have to discuss this with our admin team, but my initial plan is to defederate meta if usage by them hits 25%. if a critical mass of the fediverse does that, in the worst case we'll split off from them before taking damage, and in the best case we'll actively siphon away their user base. (and if any other tech giant enters the fray, we'll just have to include them in the 25% quota as well.)

update: we discussed the topic and went for an immediate defederation