Do not submit individual games from indie game bundles, e.g. Humble Bundle, Indie Royale, etc.

From the FAQ: http://www.steamgifts.com/forum/91wob/faq-and-guidelines

"Users may not submit individual gift from any bundle. This includes either keys for activating the entire bundle, parts of the bundle, or individual keys or giftable items/games. Please do not submit games from bundles while they are on sale to avoid confusion. These giveaways are subject to immediate removal. Members may only submit unused, giftable links of the bundle. Accounts that habitually violate this policy may be suspended until further notice."

Those who post 'reported' like BadMedicine did though, should keep in mind the following rule as well:

"Do not call out submitters in giveaways. Please click the report button or submit a ticket, do not comment on the giveaway claiming the giveaway to be fake."