This line was clearly not written for anyone who's ever been through college. I, for one, would love to see the textbook market devalued. The abusive practices employed by these publishers are thoroughly reprehensible.
When I was in college my physics professor had us use a Newtonian physics textbook published by Pearson (one of the plaintiffs) that was then in its 14th edition. He asked us to buy the 13th instead because it was affordable ($30 instead of $200), and he provided question mappings to the 12th edition, since the only thing that changed from the 12th to the 13th was the order of the questions.
If Pearson is really so worried about the textbook market becoming devalued, they should consider letting up on their abuse of college students. It's pretty much inevitable that faced with five $200 textbooks students are going to look for alternatives that don't involve paying Pearson what they think they are owed.