When using Groupon or other services where customers are not paying US directly, the only way to TAG that (mark this as a groupon pmt, for example) is to create a 'product purchase' for '$0.01' = since we do not enter (or know) the actual REAL total amount we are ultimately getting... (this applies to several third party partners that take a commission on a sliding scale)

Can you please make the "Other Payment" option available EVEN when the total is $0.00??

This would GREATLY improve our Reporting options!!