MySQL published a post on its Facebook homepage which describes how to start and stop cluster using a management tool, then follows a short url and redirect to this URL
https://blogs.oracle.com/MySQL/entry/starting_and_stopping_a_cluster
We can see this page is recommending visitors to take the training course. And note that this page is Orcale's blog, so it's using its blog to promote this training course.
So this is how MySQL using Facebook and Blog to market
