Humble Bundle question

The non-BTA games are 1 key.
The BTA games are another key.
Riptide is its own key.

Unless I'm mistaken.

The games are on 2 keys. Non-BTA on one, BTA on the other

All the games below the average are in one key, dead island and the DLCs are also in one key

Ok. Games without BTA = 1 key. Dead Island + SR3 DLC's = 1 Key. 2 Keys all.

You can't redeem the BTA key on its own, but I'm not sure if it requires that you already own the non-BTA bundle or just Saints Row 3. Hopefully somebody who owns SR3 already but hasn't used the first bundle key will try it and let us know.