I don't know where you're getting "considerable time and effort" from, but it's wrong.
What Is Consideration?
Consideration is a legal term which generally means an undertaking in response to a promise. There are generally two types of consideration in the context of sweepstakes promotions: monetary and non-monetary. Monetary is typically the payment of money, such as the purchase of a product or a service or the direct payment of an entry fee. Non-monetary consideration is an entrant’s expenditure of considerable time or effort.
Getting permission to publish artwork has no monetary value and does not require considerable time or effort.
What Is Consideration?
Consideration is a legal term which generally means an undertaking in response to a promise. There are generally two types of consideration in the context of sweepstakes promotions: monetary and non-monetary. Monetary is typically the payment of money, such as the purchase of a product or a service or the direct payment of an entry fee. Non-monetary consideration is an entrant’s expenditure of considerable time or effort.
Getting permission to publish artwork has no monetary value and does not require considerable time or effort.