Bundle multiple upsells into a single transaction. (We suggest this option if you have more than one upsell after purchase.) A single invoice is sent for all the upsell transactions at the end of the upsell funnel and all the Campaigns and Rules are run for all the Upsell Forms at that time. This batch process starts after the time out period has expired for the last Upsell Form.
At that time, all of the the Upsell Forms enter the processing queue; transactions are processed every 15 minutes. That means all of the charges are processed and all the Campaigns and Rules for all the Upsell Forms run after the total of the time out period for the last Upsell Form plus from one to 14 minutes, depending on when the Upsell Forms enter the processing queue.