I’ll be honest, I’ll assume bad faith from Meta until proven otherwise.

A good example here is the first version of Google chat, which federated with jabber - until it didn’t. I was quite vocal about converting my friends to it because it was an easy entrance to jabber, with a brand and interface they trusted.

Then once it was big enough, jabber federation was cut off and we looked like the weird outsiders.

Federating Meta will feel like a win right up until it doesn’t.

That 500AUD doesn’t just sit in an account and magically contribute to anything.

Currency exchange doesn’t actually happen in a vacuum. The only reason your Bangladeshi example is able to send 500AUD to his family, is that someone who has Bangladeshi Taka wants 500AUD to buy goods or services from somewhere that accepts AUD. And there’s a very short list of countries that spend AUD.

So that 500 doesn’t disappear to never return. That 500 is sold to someone who wants to use it to purchase australian exports.