I just read your proposal in Kusama Treasury.
I like your encointer project.
I was thinking on another project that involved locality, although not for the particular purpose of providing unique identity. I would like to share it with you in case there is anything you can recycle into encointer.
The idea was around helping small business get organized to better compete with dehumanizing profit making ones such as Amazon. In fact, small business can compete better when they work together as a cluster.
I imagined a shared fidelity program (air-miles like, with discount points, etc) on chain, with some peculiarities. Points can be exchanged in any participating small business, not only where you got them. Points are worth more if spent near to the place where you obtain them (locality).
For example… when you shop in your local supermarket, you may get points that you can use to have a coffee nearby.
When working as a cluster small business become like a mall, they benefit from each others traffic, referrals, etc. This would be an accelerator that encourages to spend nearby.
When I saw encointer I thought that Small Business could play also an accelerator role.
Perhaps encointer could include something similar so that the business are in for their own interest and can play an accelerating role in your adoption.
For example, they could omboard new users by simply granting reward points, or similar. Encorate users to install a wallet to receive their points Then the same wallet can be used for p2p activities, etc.
Anyway… I was just brainstorming. I hope you are successful with your proposal.
Although briefly, I also lived in Zurich, and I can imagine it as a good place to kickstart this kind of initiate.