The 4:45 pitfall with a 30hr layover is well known, average credit trips could become higher credit trips. But the opposite is true as well on a 30hr layover with a 4hr min day, low paying trips will be abismally low paying trips. Actually, 30hr overnights or not.

Take a 4-day trip with day 1=5hrs, day 2=4hrs, day 3 30hr layover=4hrs, day 4=4.5. 17.5hrs total, 4:37 avg. If your junior, I see ATDG as an insurance policy against bad trips ever being shoved down your throat.