Hhilton legally lets you and in fact, advertises it!
In such cases, it is NOT illegal nor not a bad thing to discuss.

In fact, maybe, like me, the original poster is writing a book on miles follies! ha ha ha
In which case, just KNOWING about something should not be a bad thing to talk about, right?
Anyway, if the orig author of this post emails me, I have an idea or three to help you in your quest (legal or other)...