Looks like Ludia slipped in some battle incubator changes… especially to the 24 and 12 hour.
DNA is less, not sure if coins are or not, and it looks as if contents may change based on arena - which was never the case for the 24 and 12. People elsewhere are posting screenshots and discussing this.
Reminds me of when they changed the strike tower rewards without telling anyone, just one day - less coins. Oh, they also dropped DNA rewards in the battle incs once before.
Pretty sneaky sis… what a joke. Just go to an all pay system already and drop the pretense.