Depends alot on how bad it is. If the movie is good enough(or bad enough) to draw attention to the original work, then I would take the money and sulk about it but at least happy I have more eyes on my work (the money's nice too I really need it at the moment).
However if the changes and adaptations are outright garbage and offensive and makes the original look like garbage hell no just no, no matter how much money. Like adding a Big romantic subplot with my main character aged up to 16 at the start and focusing on getting a boy to like her that would take up so much screen time.(We need that romance to draw in the crowds) . No