Well, I am not banned yet but expect it to happen soon... although I tried to be very careful. I only used Hekate once to load FIFA over Octopath Demo and kept the console in airplane mode the entire time. When I wanted to play Fortnite online I decided to remove as many traces as I could and thought of every possible way Nintendo may possibly find out what I did.
So before I went online again and bought FIFA off the eShop, I deleted the save data of the Octopath demo as I thought maybe Nintendo compares if the save data of a title matches with the title itself and they would notice Octopath has FIFA save data. Maybe that is a cause for some bans? (Mismatching title and save I mean)
Besides that, I can not think of any other traces I may have left, only thing is a 2001-0123 error log that Hekate caused when it somehow failed the console to boot, although I guess that's a generic error code that can also rarely happen to normal consoles when they have a hiccup while booting.
So again, atm I can still access eShop, Fortnite, log in to FIFA (which somehow retrieves Nintendo account data), play Mario Odyssey balloon stuff... let's see for how long