I've raided Kobo... I've used some 85%, 75% and 70% codes I've found in the Kobo thread. I started with the 85% one, and only stopped buying when none of the codes would work anymore.
Let's just say that the amount of books was... uh.... large. However, at an average price of about €0.98, I can afford it, and they were all on my very large fantasy wish list
These books will be a Christmas present that I have to buy for myself, because the person giving it to me doesn't have a zilch of understanding about ebooks (or computers... or the internet). Therefore I'll create a "gift card" and print it out on some nice photo paper, so that person actually has something to actually give me after Christmas dinner
The only thing I hate is that there is ONE book in all of the series that Kobo did not have, and I had to spend €4.50 at Feedbooks to be able to get it. I see that quite often, that a store is missing one book in a series o 4 or 5, while other stores also have the series, but are missing a different book.