"Apple executive Eddy Cue emailed Amazon CEO Jeff Bezos in 2016 suggesting Apple would take a 15% fee on subscriptions that signed up through the app, which is lower than Apple's customary 30% fee for most in-app purchases," reports CNBC.
The approach showed that "big players can negotiate for better business terms" on Apple's App Store.
Cook, however, testified on Wednesday that "We apply the rules to all developers evenly".
In 2017, Cook announced that Amazon's Prime Video service would be launching on the Apple TV set-top box.
Apple generally takes 30 per cent of the initial purchase price, including 30 per cent from the first year of subscription services that customers buy through the app, then drops the fee to 15% in the second year of a subscription.
Swedish music streaming service last year lodged an antitrust complaint with the EU regulators, saying iOS App Store rules are unfair.
Spotify said that Apple requires it and other digital services to pay a 30 per cent tax on purchases made through Apple's payment system, including upgrading from a free to premium subscription.
Apple slammed Spotify for wanting "all the benefits of a free app without being free".
(Only the headline and picture of this report may have been reworked by the Business Standard staff; the rest of the content is auto-generated from a syndicated feed.)
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