I believe she is intelligent in one way: that crafty, manipulative, devious smart that allows people like her to build up some grand story, and convince themselves it really happened the way they're saying it did.
Not really. The only thing she knows how to do is pick her victims. Look at her girlfriends. She goes after ugly, meek and stupid chicks without self-esteem. Self-sufficient enough to cart her around, but too weak to think for themselves. Everyone else in her life she controls with money. They all openly hate her but stay around for the handouts. None of those people really care if what she says is the truth. They're either in it for the cash or think they don't deserve any better. Her viewers, I. E. the only people who give a shit about whether she lies or not, have caught her every single time.
I mean, look at her. She looks like shit. She could do one of her low effort "hi guyz" in her woe is me voice, claim to be having really bad nausea or whatever, and build the story as if it actually happened to her. She doesn't have to show scars on her abdomen - she never shows it now, so if she claimed to have an operation, it would just be her word. Could she rope the other gays in the house to go with it? Well, since the makes the most money and pays for a shitton of stuff, I bet they would.
I don't think she'd get away with half-assing this. She's made a choice to monetize her cancer diagnosis the very same day she found out she had it (if she does have it), and people are already asking lots of unpleasant questions she doesn't know how to answer. How bad is it? What stage? What grade? Has it spread? What's the prognosis? Which treatments did the doctor recommend? When is the next appointment? No idea.
She literally just found out, so it's somewhat understandable that she knows nothing. People are going to become very sceptical if she still doesn't know anything two months from now. I doubt there are that many 500lbs women chronicling their battle against cancer on the internet, and even if there were, she'd be too lazy to do some research to make her lies more believable.
Again, cancer is not fibromyalgia. It leaves its marks on you, and if you make a living off your vlogs, you can't hide that stuff. She'd have to conjure up some kind of physical evidence of her sickness eventually, and you know that a dainty gorl who is afraid of storms and raw vegetables would never have the balls to injure herself. Munchies are hardcore. They exsanguinate, tear their flesh apart with their bare hands or put broken glass up their hooha just to get a chance to snap a picture of themselves in a hospital bed.
Last but not least, as much of a brain dead zombie as Becky is, I doubt she'd be on board with her girlfriend faking cancer for money while her own mother is dying from it.
For now, I still believe she has something, although she might be misinterpreting what her doctor told her, and she's just too stupid/lazy/scared to be an adult and seek treatment. If she's faking it we'll find out soon because there is no way she is competent enough to lie about something so complex.