I didn't see this when it was first published July 5th. Couple of things the author missed or was confused about (for example, doesn't understand that Adobe bought Fotolia and that all work submitted to Adobe is sold both places) but it's a interesting perspective.
https://petapixel.com/2017/07/05/want-sell-stock-photos-heres-comparison-major-services/His comments on how terrible Getty and iStock's contributor interface and customer service are delightful

For example:
"With a poor site, youd think maybe they have good customer service for their contributors. Well, unfortunately youd be wrong there too. Every ticket Ive submitted has taken months literally months to get resolved. After a poor site design and no customer service it makes it seem like all that money they make, just goes right into their pocket and they dont invest in the company itself."
Here's his very small SS portfolio
https://www.shutterstock.com/g/michaelgodek