What are some ways to monetize popular Facebook Pages and Groups?

There are many ways with which you can earn though a facebook page but there are some cases that after adding ads to those page the engagements on those pages dropped drastically. Now for monetizing through the page there are many websites who asks to add a link to their website and pay according to the views of that post. One of the websites that pay are: http://Bewakoof.com They sell T-shirts in india and other facebook pages that are currently monetizing may be https://www.facebook.com/delhimetroconfessions.

Sell merchandise through those pages!

I would suggest one of the companies that offer you a list of links to the articles related to the topic of your group and then you post the link you pick and get paid for every click the link gets. There are also companies that pay you when you run any link through their site and then when a person clicks on that link a banner is shown to them, but that's pure spam in my opinion.I can recommend http://business.nster.com/?utm_source=forums&utm_medium=quora&utm_campaign=facebook - their prices are quite nice and they work with pages of any size. There are also other nice companies like http://mylikes.com/, http://skylikes.com/, https://www.fans2cash.co/, but I think they have sometimes limitations on how big the page should be.

promote content but make sure you boost them as sponsored content