There were a bunch of flyers in my English class about the www.poeticpower.com poetry contest. They seem a LOT like poetry.com; here's one of many suspicious quotes from their site:
"Who is Creative Communication? Creative Communication is a company who is devoted to the promotion of writing, teaching and appreciation of student writing. The intent of the student writing contest is to motivate creative writers. The top entries are published in an anthology that will record the creative insights of today's young writers. There is no requirement for a student to purchase an anthology, however, if a student wishes to purchase one, it is made available at an affordable price. Winners of the contest and the top 10% of the schools that enter receive a free copy of the anthology. In addition, any teacher with 5 or more students accepted to be published will receive a free anthology that features their young writers."
The anthology thing is what first made me suspicious. The anthologies have completely unattractive colors, have no distribution, and if you want to order them, the site won't even let you see sample pages, individual covers (I saw two of the covers, one on the flyer and another on the site), or even author lists! The only market for these things is poets! I bet they accept everyone as a "semifinalist," like poetry.con, and go from there.