When I bought my condo in downtown Austin, the sales agent identified himself as the person "marketing" the building.
Was he doing market research? No. Was he formulating key messages for marketing programs? Well, a little bit. Was he producing brochures and other collateral? No.
It seems to me that some people like to say they are in "marketing" even if they're really salespeople. (Not that there's anything wrong with being in sales.)