I used to feature screenshots a lot, going through the gallery picking out the ones which were either unusual or fresh.
The problem then became of of monotany - everything started to look the same. You'd have people uploading 3 or 4 generic looking shots per day. Screenshots became irritating rather than exciting. That's when I lost interest. You have only yourselves to blame.
The only solution is to have screenshot of the day heavily moderated. Screenshot of the day is featured across many Stardock sites. This means the choice has to be a considered one and has to represent skinning to a wider audience than just the 'screenshot clique'.
The 'screenshot clique', or 'rat pack' as some of you like to be known, is entirely responsible for the decline in the screenshot gallery. You upload endless numbers of samey shots, boost each others ratings, and lavish praise on each other. What good is that doing for skinning?
There are seveal reasons for uploading a screenshot: showing work in progress, showing your current desktop, showcasing skinning to a wider audience. If people are genuinely changing desktops as frequently as uploads suggest, then they are not getting the best out of skinning. Customising a desktop should be fun rather than a ritual.
Sorry to be so blunt, but you need to take a good look at yourselves and what you are doing.
Why do you want a screenshot featured every day? To showcase skinning or for some kind of personal gratification? I suspect the latter (though I may be wrong...), in which case it's hardly suprising no-one is listening.
You are all looking to either Stardock or WinCustomize to make a decision. But as I see it, the decision is yours. It is up to you to put forward the case, not by constant moaning, but by being pro-active. I suspect the powers that be are sitting back to see what happens next. So, what happens next is down to you 
Make a difference.
Disclaimer: please note these are my personal views and not those of Stardock or WinCustomize, nor are they representitive of any of their official policies.