Just in case anyone has missed these:
vis20 gets you the first month for $20. It is an employee referral code. I have zero affiliation with him.
save20 is not a referral but also gets you the first month for $20 but cannot be combined with other promos like the $100 mastercard deal.
And if you want to use a cashback site topcashback.com has 8% back of purchases. If you are new to topcashback there are referral codes in the referral thread for extra cashback.