Wankz has not been updated for past 4 months. That is shame, because they have good content. On the other hand content released in SLR and other sites are old, maybe over year old compared to their site. That is understandable as BML5768 said.
I am concerned about how do you communicate that to potential customers. I really like your page where all studios and other statistics are listed: https://www.sexlikereal.com/studios
Under Wankz it says 0 updates in 30 days as it should be. But do you really think that this is sufficient for potential new customers. Maybe they just browse Wankz content inside SLR and think everything is ok and new content is coming. They subscribe and after a while feel getting screwed because new content is not coming. I doubt potential customers are rarely visiting your studio page.
If wankz is not uploading content to SLR anymore, it should be mentioned clearly. Maybe some large stamp like: "No updates anymore" or something like that.