The problem with these lifetime subscriptions is that you never know if you're going to actually use them. Textbook prices are definitely a problem, but it's usually much easier to rent or resell textbooks than the equivalent of software.

You also don't buy textbooks until you actually need them. I know many students who have felt pressured into "saving money" on "all 4 years!" plans only to find they don't need a product most terms or they stay and extra semester/term/year and need to spend even more than they were planning.