I don't really understand the upside to an FB stablecoin, but maybe I'm missing something. Why would I want FB to be the store of my money instead of FDIC-backed banks if the value and purchasing power is going to be identical?
We'll see what their fee structure looks like.
If Facebook has fees that are less than industry standard I would be highly suspect of that payment method.
It would definitely be a big shift from the "support" they offer now, admittedly, but if they can break the Visa/MC duopoly at scale, I think you could make a business case for it.
Again, I would be highly suspect of Facebook if they charged less than the industry standard, especially if they don't explain how they cut costs for risk management.