There's technically no way to "swap" the provider; you can't extract payment details from the Apple-provided subscription infrastructure (partly because there m

There's technically no way to "swap" the provider; you can't extract payment details from the Apple-provided subscription infrastructure (partly because there might not even be payment details - they might be using carrier billing or iTunes gift cards). However I don't see anything that suggests that's what they're trying to do - what I assume they're after (which would be very reasonable) is to offer direct card payments in addition to Apple's option (with the direct option priced cheaper to offset Apple's cut).