Interestingly, I read an academic paper that discussed how spamming vendors often actually deliver on these prescription medications, etc. You'd think they'd take the money and and run scammers, but in fact it's marketing for actual commerce.

I think lot of those real businesses are selling their products this way, because scam/adware networks are much cheaper than AdSense (few dollars for ten thousands of views)

I saw lot of adware ads are also for courses for _rich life_/making money on internet etc. I can imagine these businesses' target demo are people that get affected by adware.

Although the medication you get may be counterfeit and either contaminated or not the actual chemical that you want.