Wild guess: did he wipe his Trust list too? That leaves no reason to include him.
You, are correct. He delete all of the his feedback and trust list, although few users already explain about their reason to include him, it seems this time we need to hear their opinions (again).
[...]
Ahh well, at least now someone can say that he's no longer in DT1 because he wiped his entire trust list and thus he made himself ineligible for DT selection.