Yes, that was my only reason for employing the abbreviation. In any case, it appears that the mods have chosen to switch out the title with a different one (my original carried an excerpt from the job posting which is now removed).

Not so often. Looks like 9 cases of AMZN in the last year compared to over 3000 for Amazon.

Incidentally, abbreviations are not a good way to work around HN's title limit. The idea is to find a shorter meaningful title, not to use tricks to squeeze more in. This is nearly always possible.