Подарю, отдам, Басарабяска

Here is where the value of 1XBONO200 becomes clear: it adds a 30% bonus increase to the regular reward. For example, if a user deposits $10 after registering, the standard bonus would be $10. But by applying the promo code, the user receives $13 in bonus funds — an automatic upgrade enabled only through the use of the code during signup.
Express Bets: Combine outcomes from different events. All outcomes must win for the bet to succeed.
Martingale: Double the stake after a loss to recover previous losses.
What is a Bookmaker’s Margin? A margin is the bookmaker’s built-in profit, included in the odds.

Source:

1xbet free promo code singapore