I have no idea why I did not apply for this before now. It took less than a week for Google to get back to me and it looks like a fair deal.

Now to get in the coveted Checkout Developer Integration Incentive Program - if it's still open -Referral Bonuses and Tracking
For the next 12 months, you will receive financial bonuses for referring
merchants to Google Checkout. For every merchant you refer that processes
at least 3 unique buyer transactions and at least USD $500 in sales
through Google Checkout, you will receive USD $25. Additionally, you will
receive USD $5 for every USD $1000 of Google Checkout sales processed by
merchants you refer. Once 12 months have passed, you will no longer
receive these bonuses, so get your merchants signed up early!







