Of course, a for profit corporation, with a track record for what some people might consider 'excessive enforcement'* would never behave in any manner less than totally upfront and above board.
* orange rectangles, software resale, demand letters to acquire websites that include 'revit' in their domain name,
IIRC my 2005 NFR license information came up the same -- permanent, no expiration. etc. Just that the EULA limited it to 30 days and no commercial usage. I have not yet downoaded my 2015 NFR suite, so have yet to see that EULA.