Does being funded means that all the projects released games? Some successfully funded game Kickstarters failed to release anything.

that's precisely what the article means. succesfully founded != succesfully released

"successfully" isn't the word in contention here. Many projects on Kickstarter fund but fail to launch. From the article: "10,000 Games projects have been successfully funded on Kickstarter."

Here's an older list of games that successfully funded but didn't launch: http://kotaku.com/12-successful-kickstarters-that-never-deli...

So successfully funding doesn't mean successful launch.