You could make the argument that the UFC does this kind of thing because it reflects well on them. Good publicity.
And if that's the case, judging from the posts in this thread, it's working.
When the UFC does nice things, it's nice, but they do some pretty outrageously awful things to fighters too and it's important to remember that as well.
But in the case of this story, good on them and I hope Dennis gets his kid back.