Hippo-Drones
Pleb
It gives you a platform to reach an audience that would otherwise not find your content.
Thankfully all the Deauville forums consist of people that are 60+ so it's like going over to me grandparents for a cuppa.
I think Facebook is great for networking, but my favourite function is the events page. I have found some brilliant motorcycle related events which I would have otherwise not known about!!