There won't be subsidy this year if teams get dropped. MLB provided up to 80% for 2023 but for 2024 they will not be doing this.
https://www.si.com/mlb/2023/10/28/broadcast-diamondbacks-padres-games-rob-manfred-rsns#:~:text=Tickets-,MLB Planning to Broadcast Diamondbacks%2C Padres Games in 2024,NL West clubs next season.
From the linked article Manfred has stated they will be in position to support up to 16 teams.
Also from the linked article:
It sounds like once the regional TV contracts are over with MLB is prepared to go all digital only.