Thanks. It is really interesting to see how that works with registered users and subscribers. It seems that a large group registers and immediately buys a subscription...never thought that would be the case

For now, you'd have to include the HTML in the SQL Query, like this:
SELECT '<a href="http://...' + UserId + '...">' + UserName + '</a>' FROM ....
I'm not sure what the exact format of the Url would need to be, but that once you find out where the UserId needs to go, you should be able to put a link in.

In the next version of the Reports Module, which is in the release process and should be released soon, you can create your own HTML template for the data and you would be able to create clickable links very easily.

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Andrew Nurse
DotNetNuke Core Team Member and Reports Module Project Lead
Microsoft Certified Professional Developer