There is something of wrong in your website. In which way is possible to have 200+ BTC wagered in only some week? I think that is impossible. Are you sure that there data are real?
Entirely possible. A wager is the bet amount. For example betting 10 btc at 1.01× contributes 10btc to the wager total. Trust me if goes fairay quickly, even with relatively small balances.
Oh, I don't think so. For 200 BTC wagered I think that there must be a minimum of good profit (minimum 0.5-1 Bitcoin). 200 BTC is too much to have only that profit of BTC. Then, everyone can think in its best way.