Is it the market size that keeps you in the iOS space? Are you on other platforms? What are the revenue/cost/effort ratios for each? Does it make sense to focus on non-iOS options?
The only thing you can do is educate consumers on the evils of Apple and hope they make better decisions in the future.
That's similar to what happened to Windows Phone. They opened up development towards the end since they could no longer justify forcing developers to behave the way they wanted; they simply didn't have the market share to enforce it.