If someone fails to submit a valid entry, they enter the first level of the Pit of Shame. If this happens a second consecutive time, they are double-shamed (have to pay more points to enter a contest) and a third time, they are barred from joining any future contest*. Mods have a separate layer of shame known as Detroit.
*This is used to be the case until somewhat recently. Now, it's subject to a few exceptions, such as someone else pulling them out like in the current contest, or they may make risky bets like putting their whole account on the line.