From the About us page:

Skitterphoto was launched in 2014 by amateur photographers with day jobs from Groningen and Drenthe in The Netherlands. We decided to let our pictures go and publish them online on our own website. Why? Because good quality free photos are were hard to find and we had some of our own. We saw our photos being used in all corners of the world and this motivated us to make better pictures. Two and a half years later we renewed our website to allow photographers to upload photos as well.