App authorization drops out after inactive period?

I see this makes more sense now. I appreciate the explanation.   One last question :  if my app makes some io to the app folder (eg. saves a new file)  would that be sufficient to maintain access and prevent an account from idle deactivation? 

I suspect that some of my users, even though interested in sharing, simply forget about their account once they published the files.  They continue to access the files via a separate search web site which uses the token to retrieve the files on demand and after a year or two suddenly no longer able to access them.