Promotion offers like bonuses or free bets are subject to specific rollover conditions and validity periods.
This means that the amount has to be rolled over a certain number of times with minimum odds within a given period of time. If you do not fulfill these conditions, the remaining bonus funds or free bets are cancelled automatically.
Example: You have received an offer for a 50% deposit bonus up to 100 EUR. In order to receive the maximum bonus amount, you need to make a deposit of 200 EUR. According to the rollover conditions, bonus and deposited amount need to be rolled over 4 times at minimum odds of 1.50 within 90 days. This means you need to roll over a total amount of 1,200 EUR to meet the requirements ((200 + 100) * 4 = 1,200).
You can always find the specific information about rollover requirements and validity periods in the participation conditions of the bonus or free bet in your account under "My promotions".