Stay with that decision.

It also costs $100/yr to keep updated. I believe HipByte has no plans to introduce a better business model or different tiers of pricing. For contrast Appcelerator & Xamarin both include free tiers and updates for free, only support is paid. RubyMotion is more accurately cloning the iOS dev payment model with annual subscriptions. And they know, you'll want updates as iOS is updated. So they push this over the entire community rather then getting enterprise costumers to pay for a scaling support model.

Wait for mRuby, or just develop in an alternate product.