There is a time limit set by DJI where it will automatically log you out. From most posts it is around a month give or take. It has happened to me once. So I make sure to log-in at lease every other week just to be safe. I have never had the...
I have been logged out by DJI from time to time too over the years, I don't remember how many days of inactivity or whatever they use. I suppose you could check the settings on your device or whatever to make sure your account is logged in that...
You need to log in from time to time (not sure of how often) to avoid being restricted in height and distance. This happened to me once in a remote part of Idaho.
Honestly.. who would know really...But if your a part 107 pilot, they won't mind collecting your money any more than the fool at the football game.
But as you say, the FAA has no say indoors. So you would be fine anyway.