That looks like it would be pretty useful for an individual person, but can you use it make websites available to anyone? It says you can copy and send projects, but do you need HTTrack to view an HTTrack downloaded website? I can't seem to find that in the FAQs. Either way, it'd definitely be good for a few people to have the website loaded using this page.
It generates HTML output, so you can view it in a web browser normally (no need to have HTTrack to view it).
Making a whole website's mirror publicly available is a pretty big copyright violation. If anyone were to make such a mirror, I'd recommend against posting it up on the web for now as it might just serve to antagonize NCsoft (which we don't want to do).
However, there's nothing stopping anyone from making a local copy and sitting on it, just in case. Or from zipping it up and sharing it non-publicly.