"Facebook may also pay users in the digital currency for viewing ads, as well as allow advertisers to accept the token for merchandise and subsequently pay for more ads with it.
There’s more, too. Notably, Facebook is said to be aiming to eliminate the swipe and card processing fees, generally around 2–3 percent, paid by merchants on every transaction to banks and payments processors and networks. “If it succeeds, the project threatens the card networks’ dominance over global payments,” the WSJ says."
https://www.coindesk.com/facebook-in-talks-to-build-ecosystem-for-planned-stablecoin-wsj