[awillen]

"The CAT said in its ruling that developers were overcharged by the difference between a 17.5% commission for app purchases and the commission Apple charged, which Kent's lawyers said was usually 30%."

Where does the 17.5% come from? I can't find it here or in the link Reuters article. Is that just the number that the tribunal decided was fair? If so I'd love to read the analysis of how they got there.

[bmandale]

"""

919. The comparators available to us (the Epic Games Store, the Microsoft Store and Steam’s lower headline rate) suggest that the competitive rate of commission would be in the range of 12 to 20%. We do think it is reasonable to make some adjustment to that range to accommodate the points made by Apple about its premium brand, the quality of its offering and its established market position. However, we do not think those would be sufficient to displace the upper end of the range and are likely to operate mainly at the lower end, where the offerings are arguably less attractive to users for those reasons.

920. Applying again an approach of “informed guesswork”, on the basis of the evidence before us, we find that the likely range of Apple’s Commission for iOS app distribution services in the counterfactual is between 15% and 20%. For the purposes of quantifying the overcharge (for both the exclusionary abuses and the excessive and unfair pricing abuse) we will use the mid-point of that range, which is 17.5%.

[awillen]

Thanks for digging that out.

[shuckles]

TLDR: they made it up.

[mikeiz404]

I haven't dug through the linked documents but it's probably in here some where... https://www.catribunal.org.uk/judgments/14037721-dr-rachael-...