Hulu claims the new ads were a hit with customers during testing. What it didn't reveal is what tier it's adding the promos to. Engadget has learned that the promos will be limited to Hulu's ad-supported, basic tier. When you're discounting prices to one-up Netflix, you've got to make up for it elsewhere, right? Chances are, those forking out extra for the ad-free experience likely wouldn't have been thrilled if they'd popped up during their pause breaks.

The ads were first outed in a Variety report last month, which added that AT&T is also planning something similar for one of its streaming services. If they take off, they may wind up on a lot more platforms, especially as the streaming wars see competing services pushing for cheaper subscriptions.

Update: 10:56am ET -- This post has been updated to reflect that pause break ads will only appear for Hulu subscribers on the basic tier.