Really? Does it? I think Twitter needs a strong Twitter, shareholders need a strong Twitter even Twitter employees need it. However the world is, at best, ambivalent about Twitter, if it disappeared tomorrow a replacement would spring up within a few weeks if the world really needed a way to shotgun their messages into the ether.
So, you know, there's that.
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If Twitter starting taking massive cash payments from governments to filter content, it would be a strong Twitter with lots of cash, but not a strong tool to fight against anything.
But is it the best because it is better than the alternatives we would have without it is, or is it the best because its dominance in messaging prevents better tools (in terms of "the fight against censorship and ... control") from being developed or gaining traction and critical mass -- e.g., is the goal you point to really being served by a strong Twitter, or held back by it?
Everyone wants to make the world a better place
Also interesting to note that over the past year insiders have only bought 1.5m shares while offloading 12.5m.
You might have a point if rich people's investment vehicles (like hedge funds, private equity or venture funds) owned the majority of TWTR - but they don't, as you showed.
And what happens if those asset managers lose money year after year or don't keep up with others?
When you're the CEO of twitter, yes. You're not going to say anything else.
Many could certainly clone the Twitter service in under a weekend, and since nobody would be using it, it would certainly appear they did a good job.
What you couldn't do in a weekend is provide something to operate at the scale Twitter does, such that it could be dropped in to replace (or handle all the traffic if Twitter ceased to exist).
There are some things where the combination of public, easy to use, short, sms friendly are a big plus for some things. Not that twitter is the only one doing these things or that they couldn't be built on ICR.