In order for Instantgo to pay you, you need to have a minimum balance of $50 available for you on your account. Whenever you have reached $50 or more balance on your account, Instantgo will wire your money on your bank account. Instantgo places the wire orders for all the accounts that have reached $50 or more once a week on Friday so the money should be on your account couple of days later.
If you have not reached the minimum amount of $50 on your account on a particular Friday, Instantgo won't deposit money on your account until you have reached that amount.
The reason for Instantgo to wait for you to reach $50 on your account to process the wiring is that the fees to wire the money would be proportionally to high for amounts lower than $50.