I've got two levels, free & pro, but the free account is not showing any info about upgrading.
If they click on 'Your Account' they are taken to a page (http://portsmouthhub.com/your-portsmouth-hub-website/?bid=2) that says:
This site has been permanently given Free status.
It's not got any information that is on the page if you go to:
There are no upgrade buttons or links within the admin.