It's an emerging rule of thumb that suggests that if you get a group of 100 people online then one will create content, 10 will "interact" with it (commenting or offering improvements) and the other 89 will just view it.

It's a meme that emerges strongly in statistics from YouTube, which in just 18 months has gone from zero to 60% of all online video viewing.

The numbers are revealing: each day there are 100 million downloads and 65,000 uploads - which as Antony Mayfield points out, is 1,538 downloads per upload - and 20m unique users per month.

That puts the "creator to consumer" ratio at just 0.5%, but it's early days yet; not everyone has discovered YouTube (and it does make downloading much easier than uploading, because any web page can host a YouTube link).

Consider, too, some statistics from that other community content generation project, Wikipedia: 50% of all Wikipedia article edits are done by 0.7% of users, and more than 70% of all articles have been written by just 1.8% of all users, according to the Church of the Customer blog.

Get the full story at The Guardian