So I finally gave it a try and here are my results.
I went through the 1st 8 sets to reach the 2nd round of free cards and spent a bit more than 185 credits for 21 cards including
- 3 virtuagirl 720p cards
- 4 deskbabes 720p cards
- 10 IS cards (7 wishlisted)
- 4 ISx cards (1 wishlisted)
10 cards I'm interested in, and 11 I wouldn't have bought.
2 wishlisted cards in the 1st set, 2 in the 2nd, 1 in the 3rd, Free card selected from wishlist.
1 wishlisted card in the 5th, 1 in the 6th, none in the 7th, then none selected from wishlist in the 2 free cards.
As a whole, it's not a bad deal because that's around 8.8 credits per card on average. But as you can see the number of wishlisted cards decreases in the second round (only 2 out of 11). If you don't mind all the random cards, it's worth it. But if you're mainly looking for wishlisted cards, this promo is not for you. At least now we know.