Until now, Google Ads wouldn’t allow you to use stock photos for image extensions, but it would appear that they have decided to relax that policy. This means that you won’t have to worry about sourcing your images anymore. This will not only make things simpler, but faster, as well.
Google is doing this as a part of a larger series of changes regarding image extensions. And now, you will have the ability to display stock images in all of your desktop ads.
Matt Southern has a post over on Search Engine Journal where he goes into further detail on this development.