I’m not sure why Facebook should need to integrate with Steem(it).

Facebook’s strategy so far has rather been to buy potential competitors which could contribute to its growth and reach.

Integration is not a term Facebook understands and there’s no need why it should.

Facebook is geared at “connecting the world”, Steem for now is user generated content and that’s pretty much where things end.

Steem(it) is even not a competitor to Facebook. And it wouldn’t be too hard for Facebook to improve its tipping mechanic for streamers and roll out a Steem-similar approach to upvoting/liking. Facebook definitely has much more clout and can easily operate a much more valued token than Steem is now and will be in a foreseeable short-term future.