It doesn't, the implication is that it's not the connection to FB what's making the app not work, but the lack of NTP sync.
Plenty of apps reach out to FB for widgets, or those stupid "share your experience with your friends" buttons that no one uses ... that's why we block them in the first place.
Do you not have temporary tags where you live? These are usually assigned to you at the dealer when you purchase a car as an in between so you can legally drive to the DMV and get your affairs in order ... also sometimes issued as temp tags when you lose yours or have it stolen.
@poquitocabeza
blokada is the way my friend ... not only for sync .. but for every other app