I still believe she'll announce she's not really diabetic because putting that level of restriction on her actions is not going to cut it for her. She can't handle that level of hate if she were to continue eating horribly. She is not as thick skinned as Hungry Fat Chick, who's pretty much lost any level of sympathy from her watchers and now has tons and tons of comments from people telling her to seek help. Chantal will still get hate but she feeds off those positive comments and as long as she can use them for sympathy, she'll do it. But that sympathy has always waned the more she refuses to change and it's likely why she's become more and more manic the past couple years.
So, we'll see. I think she's dying for ass-pats and will milk this until she can't and that means secretly eat off camera, lie on camera, and do just about everything she can to avoid weighing in. Then, when she realizes the ass-pat focused videos don't bring in the audience as much as her freakshow eating does, she'll give up the charade.