It's not like the Republican party was engaged in a large scale effort to cultivate disinformation from Russian trolls. The Russians were doing it on their own, and the GOP was just the beneficiary, playing up whatever random disinformation happened to pick up traction and occasionally reaching out to coordinate efforts.
And it wasn't "a few dozen Facebook ads" -- it was a pretty large amount of activity, including things like breaking into private systems and leaking information. But aside from that, you're basically making the argument that astroturfing doesn't work, and we know that's just not true. Having a million "ordinary citizens" extol the virtues of some position often just works better as a persuasive argument than having one or two celebrity endorsers, or at the very least it adds credibility. That's why people do it.
I don’t think it’s especially disguised…