Convenience and access have been tried by several startups (including a project that we did a few years back). It's being attempted yet again by the Brave browser with blockchain tech. With micropayments, there's a big problem with decision fatigue.

Affordability is the largest factor by far though because most people just cant pay for everything they consume for free today. When you look at video content especially, it can easily add up to several dollars per day in spend.