however if that is fine then inflated numbers should be fine, right?
Depends on how you argue for the walled garden.
My argumentation was never based on "industry standard". It may come up, but I'm basing my opinion on something else:
iOS is not a true monopoly, Apple deserve compensation for building and giving access to their loyal Apple consumer base, they have the right to make their platform and products as consumer unfriendly as they want to etc. We had this conversation for what feels like two pages.
Therefore, my opinion on this court case still stands: Apple has a right to cut ties with Epic and Epic is inflating their Fortnite Numbers in questionable ways, to make the situation look more dire than it is.
My private opinions on walled gardens and Apple are different though and I'll gladly repeat: I'm using Android because I dislike iOS with a passion and I'm not a fan of Googles data collection either. Further "Industry Standard" or "that's legal" never influenced my opinion if something is okay/the right thing to do.
For example: EGS is 100% legal and buying exclusives is the industry standard, it still sucks for me, but I would never be able to win against Epic in court.
In short: Shit is shit, independent of legal standing or usual business procedures. But Tim is an idiot for going prepared with arguments that will only impress gaming journalists, with malicious pre-actions and transparent selfish intent before a judge.
Now, in front of a jury? Yes, he might have a chance there.