While it’s a good point that the “quality” of click should be a proxy (i.e. you care that RoI might be low because of bot visits, not about the bot visits in th

While it’s a good point that the “quality” of click should be a proxy (i.e. you care that RoI might be low because of bot visits, not about the bot visits in themselves) rather than an actual measurable, is it not reasonable to assume that if “most clicks are garbage/fake”, they’re not making any money from those and therefore are unlikely to make “enough money”? I guess that assumes similar cost per click and that your definition of “enough” accounts for a sufficiently low conversion rate. On the other hand, Facebook (and their shareholders) probably cares that the PPC is depressed by the fraction of non-converting users.