You are saying net neutrality doesn't apply if ISPs fully disclose limitations. So by your logic if a person is in an area with one high-speed ISP or an apartment that limits them to one ISP and that one ISP decides to only sell filtered internet that charges 15 dollars a gb, it's totally acceptable. Net Neutrally is equal access to the internet. It means no filtering, no bandwidth throttling, and no charging for the gigabyte if the reasons for doing any of these is to block competing services or anything the ISP doesn't like.
Such as charging a per GB fee not because it costs the ISP significantly more per each GB you use, but because by charging per GB they get to make competing video services more expensive. Or blocking hulu.com because it cuts down on cable tv revenue. These are exactly the same things.
That facts are that most broadband ISPs have existed up until now without any filtering or bandwidth limits. They've existed and have been profitable for over 10 years. There is no justification for any of these tactics today, since bandwidth and network capacities have only got cheaper and larger. If ISPs needed to do these scummy tactics to be profitable, they would have implemented throttling and metered billing 10 years ago.
These billing tactics have nothing to do with increased costs and everything to do with video competition and profit gouging. They are a net neutrality issue. We have 10 years of history to prove ISPs are fine with current unlimited services. It makes perfect sense to require open unlimited connections in net neutrality. It preserves the internet as a medium of commerce. You will not see one ISP be hurt or any new ones decide not to get in the market because this is the way the business currently is. Net Neutrality means the internet stays like it is and doesn't change because of the stock market.
As a side note, the only reason dial-up was charging by the minute was because the number of lines were limited. So they had to encourage people not to stay connected for long periods of time. That model died as soon as modem capacity increased and never existed on broadband because everyone has their own dedicated connection. This bill per the byte model was an invention of the cellphone companies and satellite companies dealing with last mile limitations where your byte usage is basically your time usage(You only use network time while transferring data and not just for being connected). Landline ISPs do not have that problem and don't need the model.