One reason could be that they archive stuff that people want gone. Some of those people want their stuff gone more than the others.

Another reason could for example be tied to their identity, which we do not yet know, as they have not [yet] been doxxed.

(Also, idk what pronouns they use, some people in the thread seem to refer to them by "he", is that actually something they refer to themselves as on the record, or rather a typo or 'borken Engrish'?)