Why do broadband providers sell “internet speed” while mobile data providers sell “internet amount”?

Question

I noticed all broadband deals come with how fast the internet is and all mobile data deals come with how much internet can be used up. I am aware that the amount of broadband data for a household can be huge and 3G/4G speed can be less than perfect, but that does not mean those cannot be modified to specific consumers by the providers to my understanding.

So, what is the catch?

In: Other

Answer 1

The dumbest part of data caps for residential accounts is that the more you actually use your high speeds, the quicker you hit your limit and begin racking up overage fees.