Etsy also does same thing. They want you to list your products and also pay for the algorithm. And some people do it to get sales. And then sale funds also go back into the loop. It takes a lot of sales to even out the money being spent on such algorithm. I feel that corporations got very greedy and also there is one thing of reach too. Like too many accounts connecting them to right buyer or the person does require algorithm, and maybe this loop hole is what they are gaming.