Good job, humble bundle!
That must be their plan.
They sat around their office going "Hmmm...people say the $12 surprise monthly bundle sucked and are canceling their subscriptions. What can we do to draw them back? I got it! Weekly bundles with a $12 top tier and the games in the bundle will make the Monthly bundle look like Fallout 4, Star Wars Battlefront, Metal Gear Solid V, Just Cause 3, and Call of Duty: BLOPS III by comparison!"