Sort:  

I think the payment process itself would be quite interesting for them to leverage FB users to be locked in their platform. As the payment is the final step for the specific service, it would be huge impact on the FB to find out the future services for them as there are many useful aspects of payment data such as when, where, what etc. The privacy would be guranteed if they use blockchain with smart contract, so I think the privacy would be the intrinsic nature if they process privacy data intelligently with smart contract. As you pointed out, the choices of users for their privacy would be programmed in the smart contract, it would be very useful for FB to be very visible and transparent. But I think the payment would be the first target as they would put anothet person for privacy for a new blockchain group. Well at least my point of view and my two cents.

Coin Marketplace

STEEM 0.24
TRX 0.25
JST 0.040
BTC 93879.96
ETH 3390.45
USDT 1.00
SBD 3.34