iOS piracy is definitely understated, it exists and is not difficult to do. I've looked into it but not participated in the practice. It's not worth my time.
But as you said, the sales are generally better on iOS than on Android from what I've heard. There are exceptions of course, but having people locked into the App Store and most are unwilling to tamper with their devices so they have no choice in the matter really. Well, other than not buying the device OFC. So yeah, Tidalis on iOS has a pretty good chance to sell. Maybe Apple will feature it, but that's a hit and miss, they seem to prefer featuring AAA made games from Angry Birds creator, EA or Gameloft. Who have the worst business practices on the store.
But what is really the sad state of affairs with iOS is the crappy freemium games. The gaming part of the store is filled with complete shovelware freemium games at this point. If it isn't shovelware, it's apps that have terrible business practices. I haven't bought an app in about....6+ months now because I no longer trust app devs. I'll buy Tidalis when it shows because I can trust that you guys won't screw me out of some feature later down the road. But the rest of them? Hell no, I don't even remotely trust them. And when I did, the apps would get updated, lose features which I'd have to pay for and then would tell us to suck it up. Ticks me off...
Sorry for my ranting, but I'm not happy with iOS state of affairs right now, as you can tell.