Despite what she claims in this article, Cameron DID NOT share why she was missing performances. She would tweet vaguely stuff like "Taking care of my health" and then other tweets completely unrelated to her performances.
Hopefully this young artists learns quickly that, to keep a fan base, she has to be upfront about why she's missing performances. People are shelling out hundreds of dollars because her name is attached. She at least owes fans an explanation at that moment, not one days later.
Plus, I'm not sure I completely buy that the recent emergency room visit is the sole reason she missed these last performances. She's missed shows throughout the run.