I ordered right before I posted here on May 4 and I had to pay for shipping.
Same - there were no free shipping codes when I ordered on May 4 other than SHIPMAGIC (free shipping over $75 total).
Weird. I ordered same day and got free shipping. There were two codes: SHIPMAGIC and some other one that offered Free Shipping on any order (I don't recall what the code was)... maybe it was FREESHIPPING?!
I recall someone posting about the free shipping, but it was confusing because I put the wrong code in first and it asked me to add more to cart, so I went back to verify and realized it was a different code.
EDIT: I was just happy these were $14.99.