This contract is illegal and immoral under the laws of many states. To give away ALL your rights for a chance to win something (maybe) is a lottery. The various professional graphic artist's guilds have campaigned against this practice for decades. You may still own some sort of moral rights (under international law, which can not be stripped from you no matter what agreement you sign), but it is an empty shell after you give away all rights to any sort of reproduction or derivation or use in perpetuity. Anybody who enters a contest such as this, where they are giving away their time and sweat and skill, to receive nothing in return, is being taken advantage of. No matter what good intentions you may assume on behalf of the parties, a contract concerns that which is written and agreed to. If you later end up going to court, a judge will point to this paragragh and ask if you read it. I wouldn't line my cat box with an agreement such as this. Carolly