Few months had passed without doing any promotion, I seldom check my CB account. Earlier this year, I noticed some sales in just 2 sites. The first one got one sale and the second one got 2 sales. I let another month passed and each 2 sites made 1 more sales. In short, all other 10 sites were gone into oblivion.
Both sites are selling different products but with higher commission ($40 to $50) Several months ago I decided to abandon all other 10 sites and did not renew the domains. I started focusing on the remaining 2 sites. I assigned a dedicated writer and updated the content 1 article for each site per day. We started updating the sites last August and starting September, the sales for both sites have increased dramatically. Both sites are making 4 to 6 sales each a day and considering the high commission for both products, the total money made from both sites a day is around $400 to $600. I'm sorry that I can't share any of these sites but I can give you some hint about these products (about back pain and grow taller)
Both products are in health niche.
The success of this experiment I think is not only because of updated and good content of my promotional sites but also because of excellent landing pages of the product owner.
I tried running a clickbank site before with hundreds of products but I also abandoned it after a disappointing result. Now I can conclude that focusing in just one product and giving your best into it is more effective than promoting hundreds of products in one site unless you really have a good authority site (not a mere review site)
PS: Please don't flood my inbox with PM after reading this as I don't intend to promote anything through this post. I'm sorry I can't respond in any PM related to this post. If you have any question, just post below.