Nice.

VERY occaisonally, I get the odd code through. I do use two eBay IDs, one for selling as a business and one for personal (it's all above board - I even checked it out with eBay before opening the second one - you need seperate email etc), and sometimes it can be interesting to see that I get offered free listing or a coupon on the ID where I have very little activity, and yet nothing on the main one.

As mentioned, it can just be eBay/PayPal encouraging you to buy. And also as mentioned, you might as well take what's offered.