User roles editor - Add, Assign and Switch user roles

Hi,

I am really into your plugin but it misses a very important feature (condition).

Among with the other conditions, you should be able to set a condition based on HOW MANY PURCHASES A USER HAVE MADE in your store.

I want to change role for users who placed orders 5 or 10 or 20 times in my store.

I would not hesitate to buy the plugin if this was already in there.

Any plan to implement this in the near future?