This kind of thing is more common than you think.
In the mid 90's I began working in the online adult industry as a graphic and web designer. Before branching out on my own I worked for an American company that offered an all in one package offering hosting, design and third party billing/processing for people wanting their own adult based website. It was template driven and I would provide the graphics for their website tour, their advertising banners etc.
The majority of sites were amateurs who wanted to supplement their real jobs with a little extra cash. They'd take their own photos and videos and upload them and people would join their sites on a monthly basis (back when people actually paid for their porn).
Some sites had 1000s of members and some went on to become well known adult entertainers.
The more popular site owners (90% female) would often supplement their monthly memberships by selling used shoes, socks, stockings, pantyhose and underwear as well as clothing, lingerie or sex aids seen in various photoshoots.
People would sometimes pay hundreds of dollars for such items.
I knew of some site owners who made more money this way, particularly out of used socks & underwear that it became a full time job for them.