How is an artist this talented working on the street, for free, and not making money by the shovelload in a gallery?

https://swarfs.tumblr.com/

Russian artist Nikita Golubev has been using the name "ProBoyNick" he has drawn various designs in Moscow for the past three weeks and sharing his work online.

http://www.bbc.co.uk/newsbeat/article/39640344/these-dirty-vehicles-have-been-turned-into-art