Earlier quoted context omitted.
Account > Settings > Communication > Marketing Preferences. Uncheck them all. A bit hidden, but it does work.
At the point in time when I disabled notifications for the app, it did not. I tried that. Even after navigating dark patterns, digging into the menus, and turning those options off, I still received promotion notifications. Perhaps they've fixed it since? I don't know because they've already burned my trust and they've done nothing to earn it back. Publicly acknowledging and apologizing for this would have been a way…
And what’s worse is that the companies always seem to find a way to reset it to what they want quite frequently. One of their tricks is to reorganize permissions frequently so the ones that allow their spam to get through are always new.