My opinion...they are getting $ out of clearing this. There is no way they are just running it. They will go to all news overnights before they air infomercials. Even if the ratings aren't what they were, and it's overnights, the power ratio is high enough on news and sports stations that it's worth their while. Note that the morning news now starts at 4 am.
910 AM runs the last hour of WSJ...which is a rerun every single hour all night, with some fresh plug ins for news several times an hour. They have run this at 5am since they dropped CNET and went talk. Frankly, you can't get any money for all nights from infomercial people anyway. They want to buy for like $100 an hour or such...and if they don't get 4 times that in orders from each hour, they tend to cancel. I ran a station that had 25 hours a week of infos, I know.