The pre-order page for ad removal (a sentence which makes me feel irrationally angry) notes: “Live TV, Freevee, and channel subscriptions may continue to have ads.”
The email I got seems to define channels as “…like Max, Paramount+ with SHOWTIME, BET+, MGM+, ViX+, Crunchyroll, PBS KIDS, NBA League Pass, MLB.TV, and STARZ…”