Extra copies of individual games when buying packs

Many of you already know there are restrictive policies regarding getting extra copies of a game when bought from a pack.

For instance, if you buy the Valve Complete Pack, and you already own the Counter-Strike games, you will not get extra copies.

Other times, you will, and Valve has a page that lists some of them.

Recently I bought the Bit.Trip Collection, and even though it specifically told me I would NOT get extra copies of the Bit.Trip games I already owned, I totally did.

Now, I'm considering getting the Deus Ex Collection from GMG (it's on sale, and I have a coupon), but the site says it gives you a key, and not one key per game in the collection. This is quite common.

Unfortunately, I already have Human Revolution. That's the most expensive title in the collection, and there's no point in buying it if I don't get an extra copy.

Does anyone know if you get an extra copy of games you own in the Deus Ex Collection?

What experiences have you had with game packs, in regards to extra copies?