Although Shutterstock is well known for its subscription model, they do offer other ways to buy. In the thread some of the contributors point out that up to half of their revenue now comes from non-subscription downloads..
I took the photos in this post just after taking off from the city of Doha in the Middle East. The weather was perfect and we flew low over the city for quite some time. I was only in transit at Doha and never left the airport..