Naturally, they're not cheaper. But what I found most stunning about this article is that they're going to offer to throttle your speed rather than bill you for data overages ... but only if you're on the most expensive plans with the most data. If you have one of the cheaper plans, you have to pay an extra $5 a month for that privilege.
https://www.engadget.com/2016/07/05/verizon-plans-more-money-data/
https://www.engadget.com/2016/07/05/verizon-plans-more-money-data/