When they get to know about that fact and do not take steps to end this behaviour, although it would be in their possibilities, they might be held liable, too.

When they get to know about that fact and do not take steps to end this behaviour, although it would be in their possibilities, they might be held liable, too. So ocdtrekkies point stands, imho. Google is directly profiting from shady activities through their services and therefore has no incentive to control or stop that behaviour. That's a tricky thing.