From the About us page:

Every month, over 70.000 people from 209 countries visit Kaboompics, a royalty-free service for stock images I created. To this day the site has gathered over 6 million impressions, and the photos have been downloaded over 4 million times. Additional 2 million downloads have been generated by other websites where I put my photos (like Pexels and Pixabay). Since the inception of this site, my inbox received several thousands of messages and tweets, full of praise for my work. (…} Kaboompics is one of the most popular source of free images for lifestyle, interior design and specialized bloggers in World.