[dtsingletary]

Not to be negative, and you've likely done some research here, but keep in mind the social network policies on incentivizing sharing and social actions:

FB: "You must not incentivize users to use (or gate content behind the use of) Facebook social channels, or imply that an incentive is directly tied to the use of our channels."

[massarog]

I'll look deeper into this, but we are not an app on Facebook, and users would be incentivized with an additional entry by simply 'liking' a page via the 'like' button. Many other companies do this so I don't believe its against their policies, but again, I'll look deeper into it.

[dtsingletary]

Playing entirely by the rules tends to put one at a competitive disadvantage in social these days.

"c. You must not incentivize users to Like any Page other than your own site or application, and any incentive you provide must be available to new and existing users who Like your Page."

Not entirely dismissive of it, at least! Likes are ok.