Each contest has its own criteria. Usually a minimum and/or maximum word count limit. With some contests you must pay "member cents". (Member cents are earned from writing reviews, or are bought outright). There averages probably about one new contest a day. With so many, winning one is not that big of a deal. The exception is the "site contests." (All the other contests are put forth by the members). Site contests cost nothing to enter, and often provide a cash prize of up to $100. So winning site contests is much more prestigious than the other ones. Plus, many of the member contests have very few entrants.