I've tried Alamy and Dreamstime - waste of time. Shutterstock: 312 photos portfolio have made 4.5 $ in 5 months. It is a slow-dripping passive income after uploading it once. I would leave it on Shutterstock regardless of bulding a website - as long as there is no exclusivity wanted, it can run along. Adding to portfolio on the way. There are also project like Photochain https://photochain.io/# i guess they're testing a beta, would be interesting to see how it'll roll out. Want to find the way to earn on photography myself, didn't get far yet.