I read the same stats.
I do wonder about 500,000 users, if there were only 320,000 tx.
If correct, which I doubt - that means a maximum possible of less than two thirds of 'users'
actually made a transaction. And that is based on an assumption of just ONE transaction per user.
I would assume there was a varying amount of transactions per user, meaning even less of the so-called 'users' actually USED the place.
Nonsense figures, if you ask me...
or for a certain article, who knows but the interesting thing is, that there have been seized 3 times more Monero then