Usernames get wiped when servers shut off. The friend you drove to the airport at 5am still has the file on you.

Digital identity is rented, and it can be deleted by a decision you are not part of. What people know about you from having been helped at an inconvenient hour is stored somewhere else entirely, in a place with no terms of service. Effort that cost you something is the part other people keep.

Do the inconvenient favour when it comes up, the lift, the move, the awkward hour. It is a small number of occasions across a life and it accounts for most of what anyone believes about you.