Here's the Tweet that kicked off the Twitter thread where this was first shared:
I'm on a bit of a mission to properly tag vendors accepting #bitcoin! in @openstreetmap. This enables other apps to use this data, such as BTC Map https://f-droid.org/en/packages/org.btcmap/ and others.

And then here's the Tweet from the project's Twitter account that kicked off another Twitter thread:
We're on a mission to get merchants that accept #bitcoin properly tagged within @openstreetmap and beautifully visualised within FOSS mobile and web apps.
This is blank, currently, but their website will show the map.
Web app coming soon to btcmap.org
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