For each bitcoin deposit you make at Amigo Bingo, you will receive a stamp, and for every ten deposits, you will receive a bonus of up to $500BBs. The additional bonus will be calculated using the average amount you have placed over the past 10 deposits in the current calendar month.
The bonus ends at midnight of the current calendar month. You need to redeem the bonus through ticket and wait for 48 hours to receive the credit. The players over 80% ratio don't qualify.