Teboho on Nostr: hmmm nostr:note10we75gyw8sln4hgel4q87uydu9ce30f00s0pfhwspructe5y9kjsz2mcem

quoting
note10we…mcem

A user is someone who uses a system.

A customer is someone who rewards effort by paying for it with work or money (saved up prior work).

If you are a user of a system someone else has produced, but you are not their customer, then you are part of the product and someone else is the customer.