Remember the reward is through competition and not guaranteed percentage of there wagering requirements. Sometimes they are being pushed to bet morejust to beat other players that close to there rank.
The only advantage that whale players of Blackjack.fun on this contest was there's only few competitors in top spot which means they monopolized the rewards to recover some of there losses.
No need to doubt, you can see for yourself the daily and weekly bonuses. 0.4 BTC for the week's top spot. If you lose 2 btc, then it's 20% lossback, I think that's pretty amazing.
The point is being lost though. You gamble to try and win, and expect to lose. Getting back something from it is a bonus, and that's what we're talking about. You just don't get this back from other casinos.
Casinos offers tournament and loyalty at the same time on some casino. Tournament rewards are those rewards through competition and loyalty reward are those for passive reward through wagering. The tournament reward on Blackjack.fun is now working properly on whales because they are still few but what will be the case if there's more than 20 whale competing on top spot while the rakeback reward was only 1mbtc in exchange for there million dollar wager?
We are fellow Blackjack.fun supporters, Discussing this kind of topic for improvement is really awesome.