For $12 a month users receive a selection of games every month. All games the user gets to keep even when the subscription ends.

The lowest 1$ tier usually has 3-5 games, most of which will feature Steam cards to offset the value even further.

Just as a user can choose how much to give to a charity out of the price given, they can also choose how much to give to the devs. So if one does not feel like supporting a charity for a certain bundle they can choose to give all of the funds to the developers.

Users are not only giving to a charity and choosing the portion of the price they pay to a charity but they can also select from a list of charities to donate to. Thus giving some control to the consumer as to what kind of organizations they support.

Unlike some sites where you get charged an additional 20% upon checkout, HB does not include the VAT "on top" of what the bundles cost. So, no surprises or need to use a proxy.

The way Humble Bundle works is that it is donation based in that you can pay what you want for the bundle, with the minimum being a dollar. There are separate packages in each bundle that also ask for a minimum price, which depends on the "beat the average" price which is what on average has been donated so far..