Read the terms to Unsplash

“Photographers have balked for years about the Terms of Use agreements for Facebook, Instagram, Pinterest and other social sharing sites, but Unsplash’s usage terms represent a new low. If you upload an image to Unsplash, it could end up in Times Square with a Coca-Cola logo on it, and the Coca-Cola Company would owe you exactly nothing for that use”

https://pdnpulse.pdnonline.com/2017/07/new-low-photo-community-asks-gets-free-commercial-license-photos.html