Sorry, There’s No Such Thing as ‘Unlimited’ Data
Found on Wired on Monday, 09 November 2015
Last week Microsoft nixed the unlimited storage option from its OneDrive service. Meanwhile, Comcast started billing users extra in some cities if they gobble more than 300GB of bandwidth per month. Last month Sprint followed the lead of most of its competitors and began throttling download speeds of its “unlimited” data plan for customers who exceed 23GB per month of data usage.
What it comes down to is that Comcast and others have recognized that heavy users will generally pay more for their service than average users.
Before, the "unlimited" claims where somewhat predictable with bandwidth being the limiting factor. Now that more and more people get better access, these calculations get messed up and have the be cancelled. So as usual, if marketing says something, consider it a lie until they can prove you wrong.