I don't know the exact answer to that but if I had to take a guess, it's to avoid the "internal feature" defense. It's easier to make the case that your market

I don't know the exact answer to that but if I had to take a guess, it's to avoid the "internal feature" defense. It's easier to make the case that your market for your own product (no other digital market can sell for it, your market doesn't sell for other products) should not abide to the traditionnal rules of normal sales. Instead make the ruling clear in a case where this specificity doesn't apply, then go deeper in the rabbit hole if needed. Again I'm only guessing here but it makes sense; similar to how, if you were to go against phone os app stores, you would go after Google first because Apple has the "my market for my product" and "not legaly a monopoly [depending on how you define the market]" card.