I have been following these accounts for quite some time and looking at the alt information I see that they are very similar in campaigning, moreover, the busd migration time also coincides.
You followed their activities and found connections between them, but the evidence you added was not enough to identify them as alt accounts. But @YOSHIE has investigated the connection between these accounts and told you what format to use. So if you want to find more alt accounts in the future and prove the connection between them, then you can follow such experienced members.