Honestly, imo at least, this type of content should sell as little as possible. The sooner she realizes that people want spicier content than this, in the form of more candids and actual cosplay for example, the better.
Vote with your wallet and all that stuff, although with her uploading schedule, people are kept so thirsty that too many of them will buy it regardless. She's got massive potential and she's shown that she can definitely deliver on several occasions, but looking at all her released content so far, those are unfortunately rare exceptions.
Also; the occasional smile would make her content so much better as well. She's stuck too much in professional model mode.