1) WHY does this problem still exist, considering all of the resources at FB's disposal? 2) Where do these click/like farms come from, and what's in it for them? 3) Why does FB only do sweeps annually? Why not daily?
As you might've read in the Updates section of the post, I came to the conclusion that these click/like farms, although not supported by FB, are still a pleasant surprise for FB, as FB vis-a-vis these farms TRICK unsuspecting low budget ad buyers into thinking that they're still getting something for their money.
In other words: * Big corp with multimillion dollar ad budget = we put your ad in front of your desired audience, and you get lots of quality engagement. * Those with smaller ad budgets = we put your ad in front of garbage accounts, and you get garbage engagement. It's still engagement, though, so be happy about that.
That, or (and prep your tin foil hats for this one) one of FB's business models is to covertly financially support these click/like farms so that they encourage ad buyers like myself to keep spending $5 here and $10 there on advertising with the belief that it's actually working for them.