I heard somewhere the going rate was like 300/bucks per 10 minutes of solid voyeur film when uploaded to certain websites. Plenty of incentive for the small=time airBnB host to set up sketchy cams.

Sure, cameras happen in hotels too, but there is a gigantic liability machine -- the hotel company -- which has its ass on the line if there is a camera found; plus it makes their brand look like shit and is a hashtag away from trouble. It also means there is an org to go after with grievances if you find something in a hotel.