good decision
Skimming is so waste of traffic due to the fact that 80-90% of the signups are made from mainsite, if you optimize your spots and announce fresh sites (which can be done global with some php includes).
I dont know the site of your tgps, but clean links, or a mix of clean and incoming skim with your toplist based on productive hits is the way to go. Grow fast in 1 or slow 4 months... I choose 4 if that generates more money in the end. Just make more sites
