This is a great alternative to help wikipedia to sustain operation instead of monetary donation. Users are able to contribute with no hassle of installation of any software or extension. And it works on all major browsers (i.e., chrome, firefox). Most importantly, the decentralized architecture brings higher resilience to single point of failure which wikipedia is expected to survive. I believe the community based decentralized solution is the trend for operating big non-profit contents service like wikipedia.
B2BWiki is a project that attempts to help Wikipedia in reducing down its network burden by delivering and sharing the page content among users by using in-browser P2P (WebRTC). Each user can contribute his/her network capacity as well as own local storage (e.g., localDB) in browser while reading the page, and a larger organization might even contribute to the community by deploying own servers (no out-of-pocket money!), similar to a mirroring server in an old good day.