DieRuhe: Yeah, the wording is a bit iffy. Should say something like "If you buy three games, you then have the option to purchase up to three mystery games for only two dollars each." Using "unlock" probably wasn't a good idea because as it generally pertains to gaming it tends to mean "This is now available to you." Then again, the popup box does say "each mutator game costs $2", so if you add up the cost of the games you're buying and there's no "extra" cost there, it probably means you didn't pick anything. But I'd still say they could have done a better job of explaining exactly what was going on, like maybe a "Here's how this works" section rather than just popups.

rayden54: Horrible, horrible wording. Front page says "Pick 3 games, unlock 3 mystery mutators..."

From Humble Bundle, "Pay more than the average of ___ to unlock!" followed by the games you get when you meet that threshold. From Indie Gala, "Pay more than __ to unlock these games!" Again same thing.

As far as I know everywhere else that wording would indicate that meeting the criteria (Pick 3 games) would automatically grant you the bonuses. In this promo all you're unlocking is the chance to spend more money on a gamble.