The shortsightedness of blackhat sites
When I first started doing blackhat I made my own content generation system, very similar to rssgm . I was doing the standard spin X ammount of sites a day, get them all indexed, traffic comes, and then inevitably they would get banned. I would repeat this cycle over and over again. To monentize the sites I would either use adsense, or some adult sponsor, depending on the type of site I generated.
I was one day listening to a CD on marketing. It stated something allong the lines that the most expensive accusition a buisness makes is getting the customer throught the door. If the product they sell costs like $1 they often will spend $5 to get the customer in the store. The examples he used where the soft drink industry etc.
As ussually it takes a while for me to clue in. In this case like 6 months. Initially with my adult traffic I was either sending the user right to the signup page, or to a page full of banners. I would convert at maybe 1:1200.
But then I decided to make attractive looking adult blogs. Initially when I opened them, I was getting traffic, but no conversions. WTF, I should be converting at higher rate no ? All this effort gone to waste. For 2 weeks traffic but no conversion. Then all of a sudden bam 4 signups in 1 day :). When i looked at the signups, they came from bookmark. I notice most of my signups come from bookmarks now. What is happening is that the users see blogs. Because they are quality blogs they keep coming back, eventually they will buy.
So when you make MFA(made for adsense) sites, initially you are making profit on short term, but on longterm you are throwing away your money.