I can't for the life of me figure out how that site works. they make you pay for credits to enter the contests, these credits have no real value (meaning that if you win a contest and get credits it just means you get to enter more contests without paying), but somehow you don't have to pay anyway, you can have other people sponsor you???? huh?
I checked it out though and I've concluded that this site is much better (for photography at least), and it doesn't drive my brain insane.
I can see how a few are done (not that I could do them) and some are quite bad with matching the sharpness of the inserted objects into the main picture others (like the square M&M's) I am amazed that photoshop is capable of dong this (or maybe the M&M's are chicklets with little m's painted on them LOL)