Chrome OS - Buy more data?

Since I did get this laptop I do try to use it it for most things that I do on the web, since that's the intended purpose. Otherwise the laptop is completely useless. To solve that Google, along with Verizon Wireless, have include 100mb of data per month for free.

Now I know this is not a whole of data, so they have included an option to buy extra data here ---> Buy more data - Chrome OS Help, but with those prices I don't think they are going to get a lot of business. What I would like to know is why can't we just have one payment for internet? Instead of having to pay for house service, phone service, and ( the possible future) Notebook service? Seriously when is enough? Until the prices come down you can count me out.