Write the next sentence in this paragraph:

How to make money selling photos online
Look at several different sites' pay rates.
Basic stock photo sites like dreamstime, freedigitalphotos.net, and shutterstock are popular choices for amateur photographers, while the pros often choose getty images or corbis. Each of these sites has a different pay rate, but most sites offer at least 30% commission.
Be sure to check each site's commission rate before you sign up. Often, the most popular sites pay the smallest commission.