Advanced Package has a minimum budget requirement of $500. So if you are already on the Starter Package & want to upgrade to the Advanced Package, you can do that by paying $50.
If the service period for Starter Package (28 days) is over, you can upgrade by paying $229 (Advanced Package - $179+10% of the spend; Min. budget required: $500, min. fees for Advanced Package (10% of $500): $50; Total min. fees to be paid: $229)
If you decide to spend more than $500 per month, the remainder of the fees is paid at the end of the billing cycle.