Our profitable SaaS web app has 1000s of paying users and those apps also run very well on mobile safari.
We made a decision a long time ago as a company never to invest in iOS because of Apple's dictator like policies. We may develop a simple tool on iOS but we will never put our flagship apps there.
Apple has made it clear from the beginning that they will not be fair in their dealings with devs and in fact the opposite, they are actively hostile against app devs in many cases such as this one without being accountable to them. It's Apple's way or the highway.
Not only do we have the privilege of paying Apple to develop on their platform (that devs make more valuable to consumers) but we also have the privilege of paying Apple a 30% cut on virtual goods.
I still don't understand why so many devs have given into this. But it probably has something to do with Apple's monopolistic power.