Used to be great in the beginning. But it somehow filters sellers. So despite outstanding rating and great items and high activity. My account never ends up in any promotions that my account qualifies for. I contacted them and they just said that it was an arbitrary human managed selection. I. e. Top sellers sale may be full of people with barely any and bad reviews. Lately I noticed my items don't even get the views at all. Some for weeks. When before I would have hundreds of views within the first day. And after upgrade my account lost functionality and access to groups (from mobile and computer browser).
Customer service takes several days to reply. Once took a week. For each reply.
Unless they fix it, it is doomed :(( (