But we have another word for that which is “customer.” This definition has thus destroyed the term “guest” and deprived it of any meaning. If you knocked on my door right now and pointed at my mother in law, and I said she was a guest, would you believe I had charged her for admission? You would not. If I said she was a customer, you would believe that I had charged her. Regardless of dictionary definitions, that is the common understanding of the difference in those terms.
Otherwise, we might as well eliminate the word “guest” from our language.