Bah either way, a limit is a limit and a problem, since you're initially paying for data service at a certain limited speed, NOT a total limit to *data* transfered. These companies are simply trying to get a piece of the pie. The Highway is mad that truckers are using their roads to transport already paid for goods and services to consumers. So what do they do? Blame the consumer for the demand, and also shift blame to the product providers supplying said services... so they say, HEY! You're getting rich off our roads (which you've already paid to use openly) and WE WANT some of it, even though YOU do all the work and production. We're just the middleman carrier, which is ALL they have been, now they are trying to inject themselves into the product & services relationship.
It's all bullshit posturing to fool people into thinking it's a different issue than the OBVIOUS one—GREED
Newer fiber optic technology/servers/chips etc... as technology progresses it makes operating costs CHEAPER, but according to the ISPs: Once the initial infrastructure costs are paid, it doesn't cost anymore to transfer 25GB than 250GB. As technological innovation increases, less and less human monitoring is needed = money saved. Also equip reliability and uptime increases = money saved... ALL of the hardware ISPs use has a warranty, has a MTBF rating, THUS the 25GB Vs 250GB price tiering is just overt greed. The machines will run and last as long as they are designed. It's all just greed.