It's a matter of probability. It's unlikely that an original project will start becoming abusive on its own, especially if it has a long history of trust. Someo

It's a matter of probability. It's unlikely that an original project will start becoming abusive on its own, especially if it has a long history of trust. Someone unrelated, who is just high jacking other's fame and has built no trust on its own? More likely. And if it's just a throwaway ad-farm that was set up once, it's likely not receive much care. So there is a higher chance that a hack of the site will go under for a long time, or that the owner will just sell it at some point to a malicious actor. Anyone being long on the internet has seen such things happen more than enough, so many people have a legitimated lack of trust against those sites.