I can only say it's worth the effort putting your work out there!
It's a sad fact but the responce last time was pretty poor despite extending the closing date there were just 8 entries, if you compare this with competitions in the US which seem to be so well subscribed to!
I have recieved some excellent prizes for my efforts, sadly my entry peice has gone missing so probably will not ever see it again
But hey Sh!"!" happens & I got some goodies out of it!
So the guys at CPS, Please consider running another comp but maybe run it differently,
People can enter their piece via a photo (based on a theme but what ever media they choose Tshirts blanks, bike tanks), this can then be voted on, the winners of that round are then sent the blank to compete in the next round!