See, I disagree. A filter can improve a good photo, but it can't make a bad one good. I don't think it's about having a million pound DSLR, it's about being able to take a decent photo with whatever you've got. So many people just chuck a filter on instead of bothering to make their picture better before processing, that I gave up with the service.
The noise to signal ratio is just too high for me, but no doubting there's some talented folks on there.
Yeah I can see where you're coming from, some people just can't even take a decent snap to save their life, they should be banned lol. But if you want to put on a quick snap and make some small alterations then its great for that.