To view the source, go to http://www.netflix.com and find the Scooby-Doo Mystery Incorporated streaming page. The page currently shows a message that says "streaming ends 3/30." (Sorry, would have preferred a direct link to the page, but the direct link said you needed an account, which some people might not have).
It was announced today that SDMI will be removed from Netflix streaming on (Tues) March 31, 2015. However, episodes 1-12, and episodes 27-39 will still be available on disc (don't ask me why just random episodes are available, I have no idea).
Despite what you may think, Netflix is actually not responsible for the removal, Cartoon Network refused to resign the contract (the old one expires at the end of the month) that gave Netflix permission to keep SDMI on streaming.
I'm personally mad that CN is continuing to treat SDMI so badly, even after the show ended.