I have a contact in Santiago, Chile, who has an apartment with a sling that he rents to horny and raunchy tourists who come to visit. I was in that apartment last November and had loads of fun with the sling. I placed ads in different hook-up sites and had some free sex but I also paid for a couple of gang-bangs in the sling arranged by someone there and had a few guys who came over and bred my hole. That was hot and was able to do it 3 times. They charged me a certain amount of money for each "load" It was very hot...I don't know how much the guys get paid but I guess not much because it's just a pump & dump situation
It's a nice setup so when the guys come in the place is semi-dark. ("A pelo" means bareback)