I think you meant "Customers don't know".

I suspect if the UI offered customers to pay now using Apple's thing, or have a button to get 30% off by going to some more convoluted flow, a lot of people would choose the rebate.

If people want a cheaper but more complicated experience, they have the Android option

I think at the point they're making the transaction, they're already locked in. It's not like someone is going to buy a new phone and replace all their apps when they're purchasing an Uber subscription.

Plus, I think another commenter pointed out that the end user is still getting the same price on Android - I don't know if that's because Apple mandates something or a business decision on the company's side?

Yes, the premium does not matter to me because it saves so much time and convenience in being able to cancel subscriptions.

If I want it cheaper in exchange for having to deal with onerous cancellation methods, I can just go direct to the developer’s website and buy it.