KnockKnockStuff 20% off $50 or more & Free Shipping
On the home page, there is a box that says:
Get the Scoop! Sign Up and Get 20% off!
I just did this and got the email immediately.
My code was FRIEND296 which you can try yourself. If it doesn't work, though, try it with an email address on their front page and you will get your code right away.
Here were the terms of the code:
*Limit one per customer. Expires one week after subscription. Valid on regularly-priced items only and cannot be combined with any other coupon or gift codes. Free shipping offer excludes customers shipping to HI, AK, or outside the US.
They have some funny stuff!