Home Internet usually doesn’t have unlimited internet. There’s usually caps baked in somewhere. Don’t believe me? Read the fine print. At some point, at some bandwidth usage in the monthly cycle, they will throttle the living crap out of your connection. It’s written into pretty much every contract I’ve ever signed, and I’ve been with over a dozen carriers of landline internet over the years.

The reason being that they don’t want you serving websites or business class functionality with residential level internet. They didn’t build their network with those constraints. They want you paying for and using the business internet package, which has dedicated bandwidth and no caps because you’re paying for a dedicated line to be run.

For mobile phones? Old pricing models still trying to be relevant. There’s no technical reason.