I had an article chosen for further distribution, and it wasn't getting much traction. I shared it on a Facebook group, got some engagement, and then, boom! It took off again. I'm new, but I'm steadily growing an audience and the money I am making grows too. I think Facebook groups are great for a boost until you have a big enough audience of your own. They shouldn't be your only tool, but, when used properly, they can be useful.