Same here, I bought it a while back and the link in the ad just takes me to the RPublishing store. There are no instructions on how to get the textures if you already own Gear Punk and just putting them in the cart doesn't seem to do anything. The promotion didn't show up in my mailbox until after the close of day for Rendo, so it's possible that the item =has to be added to the account manually and they'll show up in the "gifts" section in a day or so.

One thing that I did notice is that the ad seems to imply that the sale on featured characters on the bottom promo ends on the 15th, but some of the items are actually on sale through the 16th, so it's also possible that the timing of the ad may be off by a day.