Y - Remove The Free Trial. (Again, this is an idea, and I don't mean to delete the free trial entirely, let me explain) One thing I noticed was that there are two different types of free Trials. The Free Trial which you can sign up for, freely, and the Recruit a friend Trial. I would recommend keeping the Recruit a friend Trial, and removing the free Open Access trial. That way, it keeps out the RMT Rabble. Sadly this causes a problem for users without access to friends who play the game, and may not be the best practice for Square to do. (Perhaps a Trial Integration with Facebook? just a sub thought)
And of course, there is the fact that the Recruit a friend trial could be abused, I'm sure this happens, but I have an idea to prevent this as well. If a friend you have recruited gets reported for RMT Advertising, you are no longer able to recruit a friend, Preventing RMT Bots/ advertisers, from abusing that system.