And my friend you can read many things here too:
According to reports Facebook got 2359620 visits from Pakistan daily and this will contribute 47.5% total revenue of Facebook. It is yet to be ascertained if the whole Facebook will be banned or just a single URL will be filtered. In both the situations, step is inline with thousands of Facebook users and according to their urge of boycotting Facebook on May 20th.
Also regarding the ban:
Facebook has met with some controversy. It has been blocked intermittently in several countries including Syria,[10] China,[11] Vietnam,[12], and Iran.[13] It has also been banned at many places of work to discourage employees from wasting time using the service
Facebook - Wikipedia
Overall, we expect many of the same advertising trends to continue. Brand and self-serve advertising should increase — but so will virtual goods revenue. A wide variety of sources we spoke to expect Facebook to pass $1 billion in revenue this year, possibly reaching $1.1 billion.