Aso Enterprises

I never understood why brands use other platforms to generate their income? It seems to me to be a scary half-assed solution to a problem. Companies change their terms of service all the time, sometimes dumping platforms off the service if they don't coincide. Case in point, using telegram and discord instead of creating their own community. I don't use telegram or discord and I'm not going to...

I made several searches for music related platforms of interest specifically mandolin and Fiddle, and wasn't able to find anything. How can I create my own?