yeah, well, first of all, these games wouldn't even have to go on sale, OK? there are some of the all time greats among them and they continue to sell even without price reductions. so, consider any discounts you get on them a bonus. and secondly, a small discount is better than none, and mark my words, you won't see them on sale again anytime soon...
That was not the point I was trying to make :)
tl;dr version: Impulse to purchase went away after removing unwanted games. Too low minimum discount. Allow gifting part of the pack after the purchase.
Discount of "only" 20% is not very enticing (to me at least) when it comes to impulse purchases. My initial thought process was close to this:
1. Ooh, DnD sale. Baldur's Gate for 3.99! I'll buy it! Wait, whole package is over $34.
2. Let's remove the games I don't really want. Now price is up to 7.99? That doesn't seem very good deal. I think I'll pass, I have other games to play now and I can buy it later if I want to play it, it's not much more expensive without sale. This probably ends up in me forgetting to buy the game when I have time unless something makes me to remember it (new sale, discussion about the game somewhere etc).
When I started to remove the games the impulse to buy quickly went away and the final price with the small discount did not reduce the price enough to convince me to buy the games right now.
I obviously don't know if all future promos will have 20% for the lowest discount but that seems unlikely. For me the "magic number" is probably 30%, as with that discount 10 USD normal price translates to under 5 euros after currency conversion (least for time being).
Having bought few of the promo packs in the past taught me that I really don't want to buy games just to own them so I am not very eager to buy games I am not planning to play right away.
As I hinted in my original post I might have bought whole pack if I would be able to gift some of the games I don't want myself (preferrably with option not to gift or download them right away so I can decide later if I want to keep it myself or give as a gift to somebody).