This is pretty standard. My app was also rejected for the same reason and needed to show proof of incorporation. But it's odd that the apple reviewers only picked it up now for Zeus.
Discussion
Could just be that. Does seem odd though that it happens the day after Damus’ disapproval
My guess is that after the SEC sued Binance and Coinbase, Apple’s lawyers advised Tim Cook to reevaluate apps in the App Store. Now Apple is looking at them with a more critical eye. The question isn’t, “Does this app comply with our rules,” but “Can we think of some interpretation of our rules that would make this app noncompliant?”
Sounds about right