If you think that your Apex booster has done a great job, then feel free to leave them a tip. Giving your booster a tip is not necessary, and their services will be fully paid for with the order fees, but a tip is a nice gesture if your booster has done great work. We pay all fees and your booster will receive 100% of your tip. To give a tip, head to your order page and look for the current skill ranking section; there should be a tipping option available here. Or, if not, get in touch with customer support.