Which digital packaging innovation has most dramatically reduced the cost of mathematics textbooks while increasing publisher revenue through the 'planned obsolescence' business model?

The mathematics education industry has undergone significant changes in how learning materials are packaged and distributed. Digital platforms have revolutionized how students access and interact with mathematical content, creating new business models and product strategies. This poll tests your knowledge about a major packaging innovation that transformed the mathematics textbook industry in recent years.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Access codes that expire after one semester, preventing resale of textbooks
Augmented reality features that require new device purchases every two years
Blockchain-verified ownership certificates for digital mathematics content
Open-source textbook platforms with premium subscription tiers