I keep geting the following email from them, I have had a look at the site and it looks like some kind of update feeder for users who want to know when new content has been added to your site, Anybody ever tried them or heard of them.
Dear Webmaster,
Congratulations! One of our users found your site so important that he/she asked us
to monitor it and get notified when it is updated.
You can help your visitors get notified when your site is updated easily by adding
the Followsite widget to your website. More details in this regard can be found
here:
http://www.followsite.com/bot.html
Many more users may have added your site to their account. We do however limit the
number of mails sent to max one per site/month.
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Kind regards,
The FollowSite Team