digitalv - 2:18 pm on Jun 17, 2010 (gmt 0)
I don't sell on Amazon, but had an idea - maybe those of you who do sell might know the answer.
If your item description was modified to indicate that it also includes a "Free $5 gift card" (substitute whatever dollar amount you like), when you ship the item you could throw in a gift card that only works with your own online store. That would result in them getting their next purchase from you directly because the gift card only works on your store.
In theory (and again this is only a theory, I have not tried this) by altering the item description and mentioning that a $5 gift card comes with the item, you aren't including anything in the box that the customer didn't pay for nor are you including a catalog or contacting that customer. But you ARE very likely to get them to your site because unlike a coupon (which would be a blatant advertisement) that little plastic gift card feels like real money, and they'll probably at least check your site out to look for something to spend it on.