Plans of providers can change, and it appears it has for Netflix. It sounds like you should cancel or just stop using the VPN or keep using the VPN if you want to circumvent the content restrictions.
That may very well happen. Or they can fix the issue. Or my guess is that we will have a clarification on the law in the US in a few more years, and it will most likely go the way that other countries are going - that this is perfectly legal.