Facebook gave some companies, including Netflix and Airbnb, preferential access to user data in 2015.
At the same time, it limited services for others.
That's according to the company's emails and presentations released by a Conservative member of the British parliament, Damian Collins.
Collins published over 200 pages of communication between high-level Facebook employees, including founder and chief executive Mark Zuckerberg.
The conversations come from the period between 2012 to 2015.
And they show how the social media company debated generating revenue by selling access to data, tracked and fended off rivals, and braced for potential blowback as it moved to capture more user data.
Reuters technology correspondent Paresh Dave is covering the story:
(SOUNDBITE) (English) REUTERS TECHNOLOGY CORRESPONDENT PARESH DAVE, SAYING:
"These e-mails really provide an unfiltered glimpse into Facebook's deliberations, something that we hadn't really seen before. I also note that Facebook said today that it would loosen some of the restrictions that they had on the ability of competitors to access Facebook user data. I think, that shows that Facebook is trying to do what it can to respond to some of the pressure on it."
Analysts say, the insight into the thinking of Facebook executives could invite new regulatory scrutiny.
That worry was behind Stifel's decision to lower its rating on Facebook shares to "hold" on Wednesday.