There's a lot of businesses, organizations, companies, Devlopers, and etc that use it as home base. Want to follow what x, y, and z indie dev is up to working on the sequel to your favorite game? Guess what, they didn't want to roll a website and social media activitly works against cross posting compatibility so they're just on Twitter. Want to follow an account that only sends something out when a internet service goes offline, and be notified about it? Better hope they thought out a open alternative because almost exclusively the companies I've worked with update these matters on their Twitter. I've even had their Twitter inform me of issues before their own status.company.com pages (frankly egregious but alas). The cesspool definitely exists, but as a tool/town hall Twitter had won. It's a mere shadow of it's former self in this regard nowadays since king elongate the fucked took over, but the after affects as well as the hole in the market remain.