Monks,
     I was looking at the user statistics for PerlMonks here and was curious about some of the user statistics. At the time of writing this it said there were;

Total Registered PM Users               33512 
Logins In The Last 30 Days              2660 
Users Never Logged In                   6337 
Logged In Once, No Write Ups            19998 
Users With Write Ups                    7177
[download]

     I didn't realize that a website with a userbase would have such a high percentage of dead users (81%) as I've never ran a website so have no idea. This is nothing to disparage PerlMonks, but it got me to thinking is this the sort of percantages one might expect on a website out in the world? Sort of like in the mail order or spam world, they know from sending out 1,000,000 emails/catalogs they'll get say 1% of responses and sales and these numbers are relied upon for these business models to work. I figure that some of PerlMonks community might have access to similar data about other real world sites and I was curious as to if there is a general set of rules one can approximate for usage and constituency etc. I'm not interested in anyone giving the actual domain name of data they may access to, but the numbers would be interesting.
     Some numbers that might be worth comparing;

[PerlMonks example]
Percentage of dead users:                     81%
Percentage of users logged in within 30 days: 7.9%
Percentage of active/contributed users:       21.4%
[download]

     Does anyone have any insight in to other websites or has someone already written a paper on say 'expected live users from userbase etc...'. Just curious... =)

Regards Paul.

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