[keenmaster]

The market ultimately determines the discount, not the company. In a competitive market, some of the gains from Apple’s change will accrue to the consumer, and some will accrue to the developer. What % goes to whom depends on demand elasticity.

Even if a particular list price doesn’t change, I’d expect more frequent and deeper sales.

In a less competitive market for a good or service (due to lack of antitrust enforcement) there should still be discounts, in proportion to the residual competitiveness. E.g. the mobile game market is very competitive, so I’d expect more discounts vs. the video entertainment market where there has been a lot of aggregation.