No, you don't have to lose in order to receive the bonus. Let me explain why:
First and most important, you're not playing vs the website (like usual casino games such as dice, roulette... etc). The website is just a mean to allow you to play bingo vs the other players. And, as we offer this mean, we take a fee from each card you and the others buy. At the end of the day we return you 50% of those fees. Those fees are the website profit from the player, but the player can still profit from winning vs the other players (the actual goal of bingo games). It's pretty much same system as the poker's rake back promotion.
So if you're lucky competing with the other players, you can finish the day with a plus on your balance and we will still release you the bonus for that day!
I see, thankyou for clearing it up, but this still actually stands as cashback bonus instead of deposit bonus , a deposit bonus in actually an instant bonus after you deposit, and the fact that you offer 50% of the fee back for purchasing the cards is actually stands for cashback bonus,
check the bolded part below, it seems like it will such a long time for one to get the 500% bonus, if I were to deposit 1
BTC , my bonus will be 5
BTC, if in 1 day I actually purchase 100 mBtc worth of bingo cards, I will actually get 50 mBtc cashback each midnight
that will resulting in 0.05x 100 = 5
BTC , it will needs 100 days to actually get the bonus, that if I constantly keep on buying 100 mBtc worth of cards each days
First deposit bonus will be issued to every new or existing player on his first bitcoin deposit.
Minimum deposit required is mBTC 50 (BTC 0.05).
The amount of the bonus will be 500% (5X) of the deposit value, up to mBTC 5000.
Bonus release: a portion of the bonus will be released every day, at midnight, directly into the player's balance and is immediately available for playing or cash out . The amount of the released portion will equal 50% of the website revenue from the respective player for the previous day.