“none of my questions in the OP asked for anyone’s legal opinions on its legality”
That is like an OP would ask about the advisability of participating in some dubious financial scam and complaining that commenters point out that the scam is illegal. The fact is that unlicensed B’n’B’s drive out of business those who are following the rules. Is it even mutar to do business with a known lawbreaker?
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Anyone thinking of listing with AirBnB might want to consult with a lawyer first.