Host is different from the 2011 thread because they've only just been aquired by Experian. For the same reason, their Contact page may not work yet, though fortunately the address in the UA string does. I suspect the Experian business is closely linked with expanding to the US, where originally they were strictly a UK service.
Disclaimer: I am always strongly biased in favor of entities that answer email. But security services that ask for robots.txt are a bonus; many consider themselves exempt.
