Second, there are not that many similarities between this research and weev's research. In this case, the researcher created 2 accounts which he had control over, then read data from both of the accounts despite not authenticating to either of them. He did not access any other customer's information (or at least he's suggesting he didn't).
Weev on the other hand scraped private information for over 100,000 customers and shared it with friends and reporters.
Both technically violated the CFAA, but weev's offense is a much greater violation of customer privacy, while this researcher has not violated anyone's privacy.
I still don't think weev should have gotten any jail time, but you're making an unfair comparison.