I'm sorry - but not surprised - to hear this. Here's a naive question... If you can detect pirated copies, can't you manually or automagically block account creation for those copies? Not sure how big your audience is right out of the blocks - hundreds... thousands... I was hoping to try this one out - it looked like a lot of fun. Here's to hoping that you can find a work-around.
I prefer to play Civil War and Tank Battle myself. I have too many other things going on to get deeply immersed in a role-playing game :-(
I grew up - dating myself here - playing Avalon Hill and SPI boardgames (such as PanzerBlitz). The turn-based games from Hunted Cow are AWESOME! I really enjoy being able to kick back for a few minutes with my iPad and play a quick game. Just wish that I could play head-to-head with a live person online. Sadly, I don't often have anyone nearby interested in a pass-and-play game.