Like people have already mentioned, Facebook banning the crypto ads wasn't the reason for the bear market. The announcement didn't really make any difference tbh.
The market is falling 'cause people are cashing out with a great loss after losing money with buying in December/beginning of January.

The initial crypto bubble has burst and now we have to see how the game continues - will we have this overall stagnation, crashing lower or will the normie money again start coming in commencing the bull market with it.