"While renting out a spare room in a flat (or even renting out a flat) may be close enough to “sharing” to be hair-splitting…" It's actually good for me to rea

"While renting out a spare room in a flat (or even renting out a flat) may be close enough to “sharing” to be hair-splitting…" It's actually good for me to read these sentences, because it reminds me that clear-minded people can have opinions that I consider borderline nutty. The best thing to do in these situations is to disagree firmly and unambiguously, but politely. Ahem. So, pop quiz, "commerce or sharing?": I put up a listing on a website that says "you may stay in my house on october 11-13 for $275 a night." If you don't pay, you may not stay. If you do pay, we now have a deal. How on earth is that so close to sharing as to be hair-splitting? It is so clearly a quid-pro-quo, money for service transaction that I think it is almost a pure illustration of commerce. If I wanted to illustrate the difference between sharing and commerce and where it gets ambiguous, this would be an excellent example of something that is commerce, not sharing, with no ambiguity.