Facebook in particular many times voiced its support for various regulations that would be onerous for smaller players.

Does that mean they actually support these regulations or could it mean that they think sounding supportive benefits them?

Even if they really did support a particular regulation, it could be to prevent a version of the same regulation that actually has teeth.

Or it could mean they hope to be consulted on the details of any regulation, which is more likely to happen if they sound constructive.

Corporations constantly navigate the political and regulatory landscape. You can't just take "supportive" statements like these at face value.

And finally there's the general fallacy of thinking that if B happens and A wanted it to happen then A must have caused B.