illustrio looks like it could be a cool resource for vector illustrations to include in your projects. Even cooler is the opportunity it presents for designers. Clicking on the “Join as a Designer” button in the header takes you to the designer’s portal:
From there you can submit your name and a link to your portfolio. Once you’re accepted, you create your vectors in your favorite tool, import your SVG for customizing at illustrio, and then you stand to profit anytime anyone buys your design. Designs on illustrio are customizable, so designers stand to profit much more because their designs can be customized by the customer.