[roninb]

One simple example would be Verizon only allowing free nights and weekends to certain services. For example, Verizon allows free night and weekend data usage for Hulu but not for any other streaming video services. This is a huge loss to Netflix, Amazon Video, YouTube and any other streaming services, including those whom don't yet exist since it would be harder to gain users due to the newer service "using more data" than using Hulu (read: the Verizon subsidized alternative).

At least, I'm assuming that's what OP meant. Not simply that "free nights and weekends" would be anti-net neutrality on its own, but that it could very easily be made more proprietary than it initially sounds. And we've seen it done in the past when free nights and weekends were were restricted to those within your telco, the x-amount of people within your network that are free to call[I believe AT&T made it 10?], the free mobile to mobile that was eventually restricted to free mobile to mobile only within the same telco again, etc., etc.