Instead of using all this fancy hardware just to contribute to a proprietary database, i'd recommend uploading to BeaconDB[1] using NeoStumbler[2] on your phone.
[1] https://beacondb.net/ [2] https://github.com/mjaakko/NeoStumbler
[1] https://beacondb.net/ [2] https://github.com/mjaakko/NeoStumbler
There's no data dump: I understand why, but it means everything is behind a pretty proprietary offering. And one which "only" appears to provide geolocation, which is fine if that's what you're interested in bit which is pretty orthogonal to the article's apparent goals where the author is interested in wireless security specifically