It can't be free as it will add additional expense for the masternode operators. Bandwidth isn't free.
Why is TOR, I2P and Johndonym free to use then?
I can tell you why, the difference is, those people believe in Privacy, you guys only believe in $.
https://www.torproject.org/about/sponsors.html.en Tor: Sponsors
Active Sponsors in 2014:
SRI International (2011-2014)
US Department of State Bureau of Democracy, Human Rights, and Labor (2013-2015)National Science Foundation joint with Georgia Tech and Princeton University (2012-2016)
Radio Free Asia (2012-2014)
An anonymous North American ISP (2009-present)
The Ford Foundation (2013-2014)
Google Summer of Code (2007-present)
More than 4,300 personal donations from individuals like you (2006-present)
I am talking about the nodes, i already mentioned you can´t outcompete a sponsored project like TOR on a technology level with thousands of helpers, thats just desillusional.
A lot of nodes are run by volunteers, same as bitcoin nodes.
This word is prolly new for you, google a bit for "volunteer". You might be shocked.
To shock you even more, i am one of those:
More than 4,300 personal donations from individuals like you (2006-present)