It is ambiguous, but it’s hinting more strongly towards being a featured author guest because “normal/usual/vanilla guests” are not Being Invited by the organizers to attend the conference in the sense in which this word is typically used in this context.
It is ambiguous, but it’s hinting more strongly towards being a featured author guest because “normal/usual/vanilla guests” are not Being Invited by the organizers to attend the conference in the sense in which this word is typically used in this context.
But fair, I’ll ETA-clarify.