I couldn't find an answer to this but, does the Humble Bundle let you pay more for a current bundle you already have and paid less than the average, to unlock the bonuses and games from the Above The Average?

I only see this option: "Like what we're doing? Click here to increase your order amount!", but when you click on this it says: "Note: use this form if you'd like to boost the amount recorded on your order. If you would like to purchase another copy, please go back to the main page and start a new purchase."

Actually, I'm not so sure... (:P)

Great! Thanks for the reply SirPrimalform ^_^

Damn! I just increased my amount using that option to get the Dead Island key, and I didn't receive it... All the bundle page is just like before, nothing new added :(

I had to contact support, and now I'm waiting for a reply... (-_-)

Are you sure you have payed enough to reach the next tier?

Yeah, the same option tells you how much you need to pay to receive the bonuses.

weird, I've done this in the past a couple of times (even when the bundles were over) and always received my extra keys/stuff

Just know that I believe there's a sort of time limit for upgrading/increasing your bundle payment. After the bundle ends, I think you have about a week before that option gets turned off.

Also, be sure you pay more than the average it states, not just enough to equal the average; it's a common mistake I see pop up in different threads from time to time.

I also think you have to pay the average of the time of your original purchase, not the current BTA.

"even when the bundles were over"? Interesting, that's good to know.
Also, I was contacted by support, and they're going to fix it :)

Glad to hear. ;)

Yes, anyway, you can increase your amount and get extra keys/stuff for 30 days (if I remember right) after the sale end.