It seems like a bad idea from a first glance. It looks like there are also Twitter Zero, Google Free Zone, and possibly others.

Other countries have the right to develop their Internet with the same freedom that we currently have. (I'm in the US.)

People who are concerned with "freedom" should be looking at the long-term effects of those policies on consumers and smaller entrepreneurs too -- not just the effects on larger companies.

Wikipedia Zero isn't about making the internet exclusively for Wikipedia. It's about putting the site into the ISP's no data charge area. Yes, it does mean that you end up with a two-tier pricing scheme ('free' and 'not free'), but to classify it as 'subsidising an internet plan to make it exclusive for wikipedia' is a gross mischaracterisation.