My carrier (T-Mobile) exempts streaming music services. It doesn't charge for the exemption and any music service can sign up for it, but it's still against net neutrality principles. It's better than AT&T's method, but only by a little. However, when they started this, I was able to cut from an unlimited plan to just 1GB/mo, and never suffer overages.
Do I disagree with it? On principle, yes. But I'm going to keep disagreeing with it while simultaneously using it as a way to lower my bill while getting around silly and even more innovation-stifling (IMO) data caps and high price mobile broadband.