I'm pretty sure about there being a subscription fee for Star Trek:Online. I don't play computer games, but I know a few guys that do. They tell me the actual box sale of the game usually does NOT make enough money to pay for the constant attention needed in order to resolve issues in the game. Apparently there are unforeseen problems and as the game is played there will be a need for maintenance. The subscription fee is intended to cover that cost. I think $15 a month would be a rather high fee and would cross into the "for profit" area, NOT just needed to keep the site and game running. I wouldn't mind a $5/month fee. That would be reasonable.
To secure the peace is to prepare for war. -Metallica