Of course they will. They'll sell out the old copies to the people who simply must have the fat Aunt Sponge and can no longer be sure to get it from the library

Of course they will. They'll sell out the old copies to the people who simply must have the fat Aunt Sponge and can no longer be sure to get it from the library, and then they'll get to sell the revised version to people who do not like the word "fat" but already have the old version. Neither of these groups would have purchased the book otherwise. On top of that, the publisher gets free publicity from living rent free in your head over an insignificant change that harms literally nobody. You're free to boycott the publisher, and everybody else is free to make fun of you for making a big deal out of a nothing burger. Hence, the culture wars continue.