And by prospered I mean, never made money, never became self-sustaining at all.
Facebook is still expanding in its 15th year.
MySpace never earned a profit pre Fox acquisition (the Google deal gave it a one time bump).
In historical terms, MySpace is barely a bump in the road, about the size of an Ask.fm type service (ie trivial in today's hyper scale). It's like looking back and thinking Excite was a juggernaut and therefore a supporting piece of evidence that Google is going to die soon.
Facebook will earn ~$20 billion in 2018 and will end the year with $50 billion in cash. That's 86 times what MySpace sold to Fox for.
MySpace peaked in size at a mere 75 million monthly active users. Facebook is nearly 30 times larger.
MySpace then is to Facebook now, what AltaVista at its peak is to Google today.
That doesn't mean that creating a new social network automatically besets the network effects of the most dominant platforms. I realize that platforms sometimes get replaced. It is early days for crypto, to be sure. It certainly hasn't reached maturity yet. However, there are examples of other monopolies (AT&T, Microsoft, GE, etc) that have lasted for many decades.
