this is very good.. indeed it can be adjusted if they want you to try some modules... imagine that ED give you the possibility to have the module "X" for 4 days, so you can try it and then buy, or after the 4 days it will be removed from your account so you can't use it anymore, I believe is easy to implement with the new license check, every month or so a module to test... I don't think is a bad idea