Your link isn't showing up yet , but I can answer anyway with my own survey. I can account for over a hundred different crypto wallets, including a number of duplicates on the same chain, some of which have been active at one point or another over the past decade. At one point about 6 years ago it was close to a thousand. And in the circles I used to frequent (miners and pool ops - often the same entities), this was a middling number, not extraordinary at all.

The simple observation that one runs* into the same several dozen people over, and over, and over again at every crypto congregation whether online or in person, should be a strong indication that this is an extremely inbred space and the sock puppetry amplification from principal to agent is conservatively inflating usage metrics by a factor of 100 if not more.

* edit: okay this is somewhat dated information, maybe today it's a couple hundred instead of several dozen.