For me, not really. There's nothing I really regret. There's one video I've purchased that I felt was a bit misleading, but I still enjoyed it and was happy to support the model at the time. I think the video was overpriced for the content, but she gave me extra attention anyway so it's not something I would complain about. The thing with the video though was misleading title/tags, and this would probably annoy most people, especially at a 2000+ token price tag. For a an advertised "girl/girl" video, most people would expect more than just some light "petting" and kissing. Would also expect some video editing that actually made sense. Kind of feels like false advertising The thumbnail (it's a great shot though) is from a part of the video that lasts about a minute or less before randomly cutting out. It's like saying oooh check out the action in this video, but oh wait, sorry, it only lasts 30 seconds.
Although now that I think about it, there was also a monthly "premium" snapchat membership that wasn't all that premium...I think most people expect more than a few "premium" snaps per week. But again, it's not something I regret, but I also didn't tip for premium snapchat after that. Anyway... I can definitely understand why they would maybe be upset about things.
Sorry for ranting a bit.... But anyway, I think most members here prefer more of a connection with their models rather than looking at models as being the "best bang for their buck."