it wasn't a gimmick to announce the lineup, no.
the post you responded to said that maybe they'll start announcing the lineup via Primavera Radio. You then said they love a gimmick and that it won't be straight-forward and maybe they'll do an advent calendar with a name each day.
maybe they will, but pretty much every year they don't, they just drop the lineup all at once.
the people reaction video was a publicity gimmick, like loads of other promo things, and meant fuck all really.
this is another publicity gimmick, doesn't mean anything unless some names start dropping.
the reaction video was in Dec (or maybe Nov?) last year, and we didn't get the lineup until January.