FAIR coin, don't know how much it's still alive but at least in the begining supported quite a few coops. It's also pretty old. https://fair-coin.org/
FairCoin is the means of exchange used by severalconfederated collectives. Our aim is to create an innovative glocaleconomic system from the bottom up in favor of an alternative andpost-capitalist model, paving the way for a collective change towards alife based on values in common. Cooperation, ethics, solidarity andtransparency are key factors to create a value exchange system foreveryone. The development and use of powerful interconnected globaldigital tools and regional hubs are crucial for our success.
​
Edit: adding link
As mentioned above, this is a volunteer run endeavor. We don't have funding and people are working on their spare time outside of full time jobs. With a project like this you want to be extremely careful. One mistake and we could set back the left years in terms of engaging with the technology. The smart contracts are already on the main net but to be secure we need to do more testing. As well as you can tell from the video update, that version of the application didn't look very good so we wanted to drastically revamp the look of the app to make it easier for others to understand exactly what they're doing when interacting with the application.
This stuff takes time. Please be patient. Or if you really want to help out, you can stake PAN or give to our Open Collective.
The Berkeley Open Infrastructure for Network Computing (BOINC) started as a platform for finding aliens. It was built at the University of California at Berkeley to enable the SETI@home program, which allowed volunteers to donate idle computer time to help process radio signals from space to look for possible signs of extraterrestrial life.
I'm not one to push products, but I would recommend people check out the Brave browser. It has built in ad-block and crypto wallet that you can use to interact with sites that accept crypto.
I think FairCoin uses a variation of PoA called proof of cooperation where the nodes are registered and take turns creating blocks, which are then validated by the other nodes. But, as you say, it is controversial and is a different approach.
Please read the sidebar. Blockchain is not just for cryptocurrency. If you want to use your high end hardware to passively contribute to something actually useful, you could look into things like this: https://boinc.berkeley.edu
I was thinking about this more today as I was reading things over at r/selfhosted . I'm spinning up a matrix homeserver and am moving to Mastodon next and it has me thinking about this quite a bit along side the big FOSS debates happening(free open source. FOSS feels and seems like a clear rejection of IP doctrine and private ownership and very in line with creating tech as public goods. Deploying matrix was really easy and I truly think (and hope) that when we can create decentralized systems that are A) really good and B) really easy to deploy people will make the switch. People want alternatives and theres areas of tech that seem to be driven by philosophies that at least have some considerable overlap.
​
edit added some links!