system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why don't physical copy's of books you buy come with a code to download a digital version?
gpt
Book sellers *could* say, "Buy the physical book and you get the digital version for free."

But then they miss out on the opportunity to sell you a different useful thing (the e-book) and earn more money.

As for-profit corporations, most book sellers have decided not to miss out on the money-making opportunity.