I blog because I enjoy blogging. I have been doing it for so long that I can safely assume that I will always blog.
I often think of just blogging on my blog and pulling out of the various social media platforms. But given the fact that most people don't use RSS and following blogs isn't as straightforward as it might be, and the fact that I currently get the best responses and conversations on Facebook, I will continue to repost my blog posts there.
In doing so I guess I'm feeding the beast. In my own modest way I'm helping to keep Facebook interesting, helping them to make money. I'd rather not be.