how how does your slogan tee have to rate before it gets printed?

ok so I looked everywhere on the threadless website but I couldn't find an answer to my question....so now I am coming to you friends with my question...how high does a tee shirt have to score in order to be printed?

if you find a slogan/idea that is not on a tee shirt and you didn't think of it but you think it would make a good tee shirt...can you use that or does the slogans all have to be totally your own thought...i only ask cause I notice that some threadless shirts i have seen were also bumper stickers on facebook and some of the bumper stickers I have seen on facebook would make great tee shirts...well thanks for your help

so how does threadless really work...like once they choose your a tee shirt idea for print do they only give you a one time pay out or do you accumulate profit as your shirt sells...just wondering

So I recently found out about threadless and I instantly fell in love. I have bought a number of tee shirts (thanks to those artists that submitted them cause my wardrobe would be lost without them) and I have submitted a few slogan ideas...i am not the best artist....ok so I am terrible....and if any of you have some advice to help me get started that would be awesome because to be honest I feel like a fish out of water when it comes to tee shirt designing.....ok later all