If you download pictures from Stock Photos while using Podium, you can use the stock photo that you downloaded in any of your PowerPoint presentations.
You cannot use any stock photos downloaded from Podium outside of your PowerPoint presentations.
You must hold a valid license to use any of the stock photos, if you cancel your license or subscription to Podium you must cease to use the stock photos, there is one exception to that; if you have already presented your presentation to your audience, that uses a stock photo then you may continue to use that stock photo in that presentation even if you cancel your subscription or license.
You cannot use any stock photos outside of Podium or PowerPoint, nor can you share them with others as standalone pictures.
You are allowed to distribute your PowerPoint presentations to others, keeping in mind the above terms.
Hopefully that was simple enough, we just don't want people abusing the usage of stock photos.
Other than that, we're pretty lenient!