Adwords continued with additional $30

I was shocked this morning when I saw the diapers.com referral credit jump from $6 yesterday to $11 dollars today. Low and behold... diapers.com raised their credit from $1 to $5 for every new referral. I was prepared to cancel the adwords campaign because it was not profitable. Assuming the campaign maintains its current performance, I should make about 100% of the money invested into the adwords campaign.