We're suppose to keep track?
Seriously, what I do is go in cycles. I will go with 3-5 sponsors over a period of time generally making the same amount of galleries and look at stats and sales and money earned and fade away from the weak 1 or 2 adding in a new site to the mix. Whenever I see something hot I go heavy on it of course like when a sponsor releases a new site.
You really need to figure out your method. If you make 4-5 galleries for a site and see 1 sale then try something else. The deciding factor is are you getting clicks to the sponsor and are you doing it honestly.