I didn't know of the Parisian study!
The IBM and Wordle thing yes, because I have been using them for years in different ways and for training sessions and the "immediate feedback" mechanism. It is good, because it is targeted, which is my point about looking at the whole life time of an account being a bit useless. But, it is nice to see that Steem pops up, but Hive doesn't. Seems I have pivoted my content a bit from being too internal looking! ;)
There used to be another site that did it here too, the one that also had the transaction bubbles. https://hiveisbeautiful.com/ - but it is dead now.