Considering the Philippines is a developing country, and people are starting to expose more to internet. Facebook definitely has the potential to enter into this market. With a population of 96.71 million, and 30 million people have access to internet, Facebook will gain much more awareness through providing free data to access the site. Although Facebook would have to pay a huge cost for free data usage on Facebook, such method would be considered as marketing expense as they are advertising and spreading awareness of their company.
http://mashable.com/2013/11/01/facebook-philippines/
In 2010, Facebook has already launched Facebook Zero, which the main purpose is to build recognition in 45 countries, mainly in Asia and Africa. Unfortunately, users need to log in to O.Facebook.com in order to avoid data charges, which confused some users. In fact, users had to pay extra data charges when they visited links outside of Facebook as they thought having free access to Facebook would lead to free access to other sites.
In the Philippines, phone users normally have zero balance on their accounts 70% of the time, yet they have the thrilled experience using Facebook or any other websites while out on the street.
If Facebook is successful in launching this tactic, I believe more users in different part of Asia would slowly expose to Facebook, especially to countries which are developing.