I have received an offer that presents a sequence of bonuses. What is this offer?

Some of our bonus campaigns may present players with a sequence of bonuses that they should achieve one by one. If the player is able to meet the requirements of one bonus within time she may be offered the next bonus. Until that time, the subsequent bonuses will appear as locked. A wait period may also be possible between releasing the current bonus and starting on the next bonus in the sequence. The link between the bonuses may be broken if the player is not able to meet the requirements of the bonuses within time or if the player makes a withdrawal.