I posted this over a the Cardano subreddit. Let me know if you would like me to keep updating this graph… I likely will any way.
It is not the number of users but the number of transactions, confirmations that have been placed on the blockchain since yours was added to the ledger.
Nice graph BTW
Thanks Jonathan. I explained it a little better over at the reddit link. I am curious if the slot leaders know how many users there actually are.
Don’t have to be a slot leader, one could tally the unique IDs from Ada blockchain explorer to get an idea of the number of wallet address but that does not indicate how many unique users there are as it is transaction based.