You can't get much bigger (well known) as a brand/company than Twitter. From networks such as CNN, FOX NEWS, ESPN, ABC, etc... Twitter is everywhere! Everyone knows them.
So, there's a check. The issue happens with the second part : what do do with our fame?
Can Twitter use their power to make services that are profitable? Yes! Do they? No, not really :(
I often wonder why it takes so long for companies like these to blatantly monetize their services. They are backed by billions yet you rarely see an ad here or a "shop" there. Its as if they feel that its a bad thing to do. Its as if they feel that they are betraying the people using their services.
I feel that these services can survive with a little more push towards that. Then again I'm not the CEO or founder of that BIG company so I'm sure most would feel that my idea is not valid. It just frustrates me that you see so much potential (money-wise and service-wise) in a product/service yet it takes a long time to see those changes.