I’m not a lawyer but the license sounds as it you can use Unsplash images for just about any purpose without a fee. (I suggest, of course, that you read the Unsplash license, their FAQ, and ask questions if you plan to use the images.)
That said, there is some excellent material in the collection—well worth a look.
The Creative Commons “Zero” license…
Examples of projects created using Unsplash images…
Supply your email address and you’ll get 10 hi-res photos delivered to your inbox every 10 days…
Thoughts?