[SpaghettiCat]

> The end result is that web is more spammed, my advantage disappers, and the new solution probably costs more than the old one, but now no one can go back.

These are not the only players in the game like you believe. Those who advertise more effectively on the web have more of an advantage over those who advertise via other media and those who don't advertise at all. And, as ads are more spammy and in-your-face, the advertised products get bought more whether all competitors are spamming or only some. Advertised products are bought more than they would be if the ads were mild or there were no ads at all.

PS: Thanks for the blog link it looks very interesting, I'll read it later.