This is an interesting concept. It doesn't really go into details, but perhaps there would be some sort of subscription fee in order to print designs.
'Spotify for 3D printing' launches stream

9 December 2013 Last updated at 00:24 GMT
First it was music, movies and novels but now everything appears to be at risk of piracy.
One company, Authentise hopes that by allowing the "streaming" of objects to 3D printers, the theft of design plans can be avoided.
BBC Click's Sumi Das looks at how object design is being protected from piracy, creating an opportunity for developers to realise their dreams rather than a risk of them being taken for free.
Entire article at: http://www.bbc.co.uk/news/technology-25266606