Do I really need a citation to prove dumb people have money? Because that's basically what you are asking. Or perhaps you believe that when people click an ad on "low-quality" site the are less likely to buy than from the same ad on "high-quality" site?
Seriously, the "enlargement penis" spam works because the average person is not that selective on the ads they chose nor the websites they visit.
Seriously, the "enlargement penis" spam works because the average person is not that selective on the ads they chose nor the websites they visit.