[tartoran]

Yes, nobody would buy those knowing they've been used in a hotel. But the question is, do they have to know? Mattresses can be repackaged and sold as new or they may have a network to place those mattresses to other hotels, BnBs etc. I even heard of cases where people were picking mattresses off the streets in NYC and "refurbishing" them, whatever that means and selling them as new.

[fortran77]

Someone renting out a few AirBnB rooms would gladly furnish them with used mattresses.

[tartoran]

That's is a possibility. I'll stop thinking about it or won't travel anywhere anymore

[fortran77]

Every hotel or airbnb you use has (with near certainty) a "used" mattress.