Why not just a direct "yes" or "no" though? You might say "they are being obvious enough" but they know from the post's comments they are coming across ambiguous and they continue to do so.
Also I highly doubt Rockstar would end on ellipsis for the sake of "ffs we already told you", they are more professional than that. And obviously it's not a good tone to take to fans for the sake of PR alone.
It's either a nice surprise. Or Rockstar carrying on false hope for the sake of hype. I highly doubt they are not aware of the fact that many people are still unclear on that statement (just read through the comments of the debut trailer post and this Q&A).