Why does it double your encoding cost? Support the majority of the market first, then the minority if you can squeeze it in in your cost structure. iOS devices are the minority devices, they naturally come second.

Supporting some single or low double digit market share at the expense of the vaster share doesn't make any sense. It's like owning a fuel station that only offers electricity and hydrogen and then complaining that it'll increase your costs to stock regular old petrol and diesel.