Embedding Broadstreet ads into Facebook Instant Articles
Below is a great source from Facebook on how to set direct sold ads in Facebook instant articles.
https://developers.facebook.com/docs/instant-articles/monetization/direct-sold
When it comes to the iframe example, you could use a tag like this, where 12345 would be replaced with the zone ID.
<iframe src=”https://ad.broadstreetads.com/zdisplay/12345.html” height=”300″ width=”250″></iframe>