There is a possibility that izanazi sold the other accounts with the private keys of that address.Since the proof you have linked crawls back in 2014,a lot could have happened then.But that's just me,we should wait for izanazi's answer.
Yeah. My investigation started from november 2016 tho and they still using the same address
1. Dec/12/2016
2. 994
3. 1Mbo7t7cB45qprrD6yYUktNpiiFWGmSs9T