While you're right, technically the trust system has been somewhat moderated in the past, where theymos deemed necessary. Usually, with accounts abusing it, by leaving like a million different feedbacks etc. Other than that, you're right.
I added you to my trust list a few weeks ago. But, You are a DT1 member already. Does it make any change on it? I mean, What if you get more votes from members? I guess there are some changes in rank?
Despite what others have said about it not counting for much in the grand scheme of things, I wouldn't take that into consideration, since it's your personal trust list. By putting someone in your trust list, you see their trust ratings in the trusted section, and if they're particularly active in the marketplace, they should be leaving quite a bit of them. Which directly benefits you as a warning.
Although, if you were to ever rise through the ranks yourself, then it will serve a purpose beyond your own personal reasons.