Gee whiz Kobo's got some promos flying around at the moment, and the big thing is trying to work out how to use them.
So, there's the Contest codes, the $5 off the first book in a new account, use a Visa card promo, $5 off a book in an account that's been dormant, and the odd 90% off code. (Also the codes that are listed on page 1 of this thread.)
Some of the promos work on any book, others only work on discount eligible books. And the promos that are actual money based also allow you to add a discount code (to an eligible book). And then you need to work out which country each promo works in.
Well, nobody said that buying a book was a straight forward process!