Asterisks by games in the create a gift drop-down menu.

Games which have been in bundles or otherwise made widely available at little or no cost are added to the bundle list, and marked with * in the giveaway list. Games in this list will not add more than 20% (1/5) of your non-bundle contributions, disregarding the first $25. For more detailed information, see this thread.

I see, thanks.

Protip: You can get up to $30 just from those, but it won't go up further until you pony up some real dough.

I speak from experience, as a dude who was broke for a long time (and who still doesn't - quite - have his feet under him well enough to give a non-bundle gift).