Legislatively, yes. Politically, it's from ex-members of the 2011 pirate party (many of its members ended up in the greens).

And I'm arguing against 'it's not grassroot'. My argument is that it's as grassroot as support for Snowden, wikilealks, whistle-blower protection. Because all of the was in the 2011 pirate party manifesto. It happened that only this legislation caught interest of other parties, but it's origin is grassroot. Have you heard of framasoft?