Two months after announcing it would automate the buying of premium ads that appear on user home pages and in their news feeds, Facebook has opened the floodgates.

Starting today, Facebook will make premium inventory available through its self-serve Power Editor tool and to third-party Facebook ad sellers like Blinq Media, TBG Digital and AdParlor. These "premium ads" are the ones that appear on the right rail of a user's news feed as opposed to a users' profile page. It's considered prime ad real estate because that's where user's spend most of their time.

Until now those "premium" display ads had only been available through the Facebook sales team and with a minimum-buy commitment. But Facebook is removing that requirement so no such commitment will be necessary when the inventory is bought through an Ads API partner, but Facebook will retain final approval over ads that are displayed there. But because the ads will be available to more advertisers, the move could ultimately democratize a field dominated by big brands.