They should just have an adult section on eBay, instead of outright ban. The adult industry isn't disappearing anytime soon (polite word for saying "porn")
Actually there is/was an Adult product section on eBay. You couldn't list good til cancelled but you could do auctions and buy it now listings. I was selling in the adult section back in 2000 and had sold a few things in there on and off over the years. Including a couple of adult themed domain names that I felt would sell better in the adult section than in the vanilla domain name area.
It wasn't easy to find the adult's section though. It was hard to find the section too.
To get there you had to go to categories then all categories. Then "Everything Else" and then the adult section became a visible category. Looking now, I see there's a domain name section in that category.
There's like 9 adult domains listed and a 10th listing for...
"Used white caucasian 51 yr old man"
LOL what? The description says:
"I need an Expensive Mother. Someone who will feed me, do my laundry, help pay bills, and drink beer with me. I am 51 going on 3. My favorite pastimes are drinking, bonfires, and spending money. I am an Aquarius. One word to describe me best is needy redneck. I like my truck. My number is [phone removed by eBay]."
That's crazy... I remember 20 years ago people were trying to sell kidneys and getting listings removed. People made joke offers like this and those usually got yanked too.
Edit: They are also getting rid of their entire Adult section according to that post. So it's not just domain names but movies, games, art, etc.