This campaign payment method would allow merchants to reward members who complete a campaign with a free gift instead of a cash payment.
The merchant would define what product(s) from their store are included in the gift, and when the member completes the campaign, Buzzbassador would automatically generate an order in Shopify shipping the defined product(s) to the member's address on record.
The merchant could also allow the members to select their choice of variant in the gifted products, where necessary (i.e. size, color, etc.).