Facebook is the defense contractor that is building America's Great Firewall and social credit system, so it makes sense that there is a revolving door with the authoritarian regime.
Why do we need a social credit score when we already have money?
1. Actually using it results in parting with it (rather than being able to merely present it over and over)
2. Money held by outsiders is just as valuable as money held by insiders (giving outsiders independent power)
#1 is mitigated by the inflationary treadmill policy, and #2 is mitigated by oxymoronic "money laundering" regulations. But the authoritarians in power are always seeking new ways of eroding distributed paradigms.