I can imagine how the time it took you to go through each of the administrators BTC scanned addresses just to provide this information. One thing you should be aware OF is that most persons prefer being isolated and prefer hiding their asset in another wallet so no one will know the amount of their Bitcoin holding. The Bitcoin addressed you scanned might be one that can be seen by the public but there is this special wallet that hold most of their portfolio. I can't believe mprep will have 0 amount of Bitcoin holding.