Most of the duping, cheating, and all around nefarious activity that was ever done was from a free account. Just end the free trials, or at the very least tie a real credit card to them. It is my opinion (and its just an opinion) we have very few new people that use a free account that turn into legit customers. Thats a number ea would have for sure. Ask this question How many paying customers came from the 1000s of free accounts last few months etc? I'd say put a counter on the account that checks for actual skill gain, but theyd just macro their ways out of that one. Maybe someone here will have a better idea.