Would there be a way (perhaps an addon module) that could send out an email report to users every month along these lines:

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Dear xx,

In the past xx days your profile on whatever.com was visited xx times and xx people clicked through to your (website, store, FB page, whatever).

Log in here to update your profile or join in the discussion.

Your username is xx and your password is xxx.

We have also added xx new users and have had xx total visits in the past month.

thanks,

System Admin

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You get the idea - give them a reminder and a sense of 'value' that having the profile and keeping it current is worth the effort.

I am thinking of this in terms of a kind of 'merchant circle' concept for an AS site for a town.

thanks,

Will