The statement "Start-up ideas that succeed big usually look crazy at first" is a sentiment that many gurus, including Paul Graham, seem to enjoy preaching.
But is it really true? In other words, are there enough cases to suggest this is not just an exception, but rather a tendency?
Here's what is not meant by 'crazy':
1) The goal was too ambitious
2) It seemed insignificant
In this context, 'crazy' should be defined as something that appears 'ridiculous' or 'absurd'.
If 'crazy' implies 'too ambitious', the gurus' statement becomes meaningless, boiling down to "successful start-up ideas look ambitious at first".
The examples that come to my mind are Twitter (character limit) and Uber & AirBnB (sharing with strangers).
Are there more cases out there?
The idea that a huge number of people will watch other people play video games and you can sustain an economy by donations and subscriptions was probably crazy at the time.
I'm not even talking about watching professional gaming tournaments. Starcraft already set the precedent for e-Sports watching. I'm talking about someone with a webcam in a basement type of content that garners a massive number of viewers.