You can use a custom domain on Arroyo. You can also capture email addresses from your visitors.
You don't have to use it for photography. You can use Arroyo to give away other types of creative assets (Sketch files, CSS themes, Lightroom presets).
Photographers who realize the benefits of giving away some of their images.
Designers who want to share their work and grow a loyal following.
Agencies who want to build their brand and increase traffic.
Any type of content creator who believes in giving back.