Gord Downie is the singer for the Tragically Hip so he is already playing the rest of the band just has to show up. Its not really an ad in the traditional since it just means that TH songs will be played instead of GD playing just his solo stuff.
Gord Downie has been on the lineup for a while now. Like at least a week, probably more. I hate CoS.
3/18-19: Starry Nites Festival @ Live Oak
3/25: Peggy Gou, Aaron Clark, Mike Gushanksy @ Audio
3/27: Strand of Oaks @ The Independent
3/31: Max Cooper @ PW
3/31: Shifted @ f8
4/5: Tin Man @ f8
4/7: Cosmin TRG @f8
4/8: Anthony Naples, Solar @ Monarch
4/12: King Gizzard and the Lizard Wizard @ The Fillmore
I think you're missing the point. Gord Downie was in no way an "add" as COS made him out to be at the very beginning of the article. Maybe COS just figured out who he was when the tour announcements came out.
As usual, Coachella fans have clamored incessantly for late additions this year. While Goldenvoice has little incentive to make any major changes, it’s hard to argue the latest move isn’t at least solid. As part of a spring tour, Gord Downie, lead singer of the royal-in-Canada, unknown-in-America alternative rock band The Tragically Hip, will play the third night of the sold-out annual mega-fest.