I think that means if you're running ThinApp under one of VMware's other products, you might qualify but this is otherwise not legal.You may Run an unlimited number of ThinApps on a licensed Device or concurrent Desktop Virtual Machine. (source)
Regardless, the site is distributing a Piriform software, which (as was recently discussed) definitely does not allow for unauthorized redistribution. So that's really the end of that site even appearing legitimate.
As a side note, I really didn't think when I started working with freeware that so much time and effort would be spent with licenses and their details.