Both of the users used the same twitter handle. Have you got the point? @NinBarongo twitter account was posted by the OP's banned account, Goethe a banned user also posted the same twitter account a while back.
Tweets and retweets in bounties are different.
The Goethe post you link didn't mentioned that he owned the twitter handle, he just posted there the retweet links including the different retweet links of different handle.
And again retweets does not give a valid proof to considered an alt, except if he posted that he declare he owned the twitter handle.