Counting Down The Days Until Her First Backpage Ad

[Rusty Eldora]

From that Wikipedia entry:

"...Bynes was also originally set to star as Ryden Malby in the 2009 comedy Post Grad, but was replaced by Alexis Bledel...
Bynes also planned to reprise her role as Penny Pingleton in the sequel to Hairspray, however, Hairspray 2 was canceled. Bynes was also originally set to star in the comedy Hall Pass but dropped out and was replaced by Alexandra Daddario"

So basically, they plan for her to be in a lot of things that don't pan out.

Or they realized she is off her rocker, who would invest $10M or more in a movie where your primary actress could flake out on you.