eBay Questionable eBay Practice Internet

eBay is running a promotion via its internal messaging system. Here is the spam-like heading of the message:
"Your $10 Coupon expires soon."
But the recipient has no such coupon. The body of the message tells the recipient how to earn such a coupon.
" SPECIAL OFFER
List and sell an item by March 19, 2014, and get a $10 eBay Coupon when it sells.**"
But that's not necessarily true. There are undisclosed conditons to be met that are revealed if the recipient clicks on a box that says "Get $10"
Nowhere in the email does it say that the recipient should click on anything. Nowhere are the additional hyper-linked conditions revealed unless the recipient correctly guesses that there might be something hidden.