Oh, please, this is nothing but PR. A total of 105 Facebook communities is drop in the ocean and will not make any real difference to Facebook's engagement.
Of course, Steemit is very different and more importantly things here are on a very different scale. While for Facebook, this is nothing and just a way to "apologize" to the communities they are going to be cutting out people's feeds in a publicly noticeable way. Here on the other hand, SP delegations could do wonders for the community and there are a ton of projects and communities that would surely use some SP well to keep growing the whole thing.