You cannot: Condition entry in the promotion upon a user providing content on Facebook, such as posting on a Wall of a Page, uploading a photo, or posting a status update.
You can: Use a third party application to condition entry to the promotion upon a user providing content to the application. For example, you may administer a photo contest whereby a user uploads a photo to a third-party application to enter the contest.
You cannot: Administer a promotion that users automatically enter by liking your Page, checking in to your Place or connecting to your Platform integration.
You can: Require entrants to like your Page, check in to your Place or connect to your Platform integration before they provide their full entry information, such as name and contact information.
You cannot: Notify winners through Facebook, such as through Facebook messages, chat, or posts on profiles or Pages.
You can: Collect an email or address through the third-party application for the promotion in order to contact the winner by email or standard mail.
You cannot: Instruct people (in the rules or elsewhere) to sign up for a Facebook account before they enter the promotion.
You can: Instruct users to visit the third-party application to enter the promotion (as described in Section 22.214.171.124). Since users must have a Facebook account in order to access an application on the Facebook Platform, if you give this instruction, they will be prompted to sign up for a Facebook account if they do not already have one.
Ja kuten jo tuossa taannoin totesin, kilpailut eivät ylipäätään ole kovin innostavia käyttäjien mielestä (vain kolmasosa diggasi niistä Zeelandin tutkimuksessa), joten ehkä kannattaa keksiä jotain muuta, millä pitää sivunsa aktiivisena. :)