There's already an NBA App, I imagine they could set up their own social network, but I guess then the headache is, they'd have to manage a social network - which can be a bunch of monkeys at typewriters flinging the vilest things at each other, the topic might not even be basketball.

I guess there's a market for shovels* there, a white label social media app/backend, customizable for organizations. Sure there's the fediverse, but companies would rather deal with someone they can call to fix things.

*) if you're in a gold rush, don't be another goldminer, sell shovels instead.