Playthrough refers to the playing requirement attached to certain rewards. When you claim a bonus such as rakeback or a level up reward, you must play the bonus amount at least once before it becomes redeemable.
Purchased funds contribute fully towards playthrough requirements. However, some game types contribute differently towards certain bonus balances. For example, Blackjack may contribute at a reduced percentage, while some games may not contribute at all depending on the bonus type.
You can monitor your progress at any time by opening your Wallet and reviewing the playthrough breakdown. This helps you understand how close you are to unlocking prizes for redemption.
Playthrough exists to ensure bonuses are used for gameplay rather than immediate redemption. Once the requirement is satisfied, the funds move into your redeemable prizes automatically.