Yes, fillippone's explanation here is accurate.

From the start of this year's changes in the trust system, theymos had been saying that he would be employing a kind of randomness, once the eligible DT1 list got above 100, so this month, since the eligible list was merely 111 (only 11 above 100), thus only 11 members would be randomly removed from becoming or being added to DT1, and therefore inclusion/exclusion from DT1 is mostly likely currently, once you are eligible, but there is a bit less than 11% chance that an eligible member would not go on the list this month.

Of course, with the passage of time, the number of eligible DT1 is going to go up as more and more members update their trust lists, so at some point in the likely relatively near-term future, eligible DT1 members are going to have less than 50% chance of actually being included in DT1 for any particular month.  

Seems a bit ingenious (or at least creatively interesting) to me....  (recent substantively relevant post here, by theymos) even though I still question the extent to which DT actually adds value to the forum, rather than contributing to some kind of semi-quasi-irrelevant popularity contest... which might even unwittingly contribute to the enabling of long cons, in certain circumstances.



Yes... this response largely succinctly answered the question, too, and concedingly before mine.....  


Another GREAT (am I exaggerating, here?) point, more tersely, preceding my own.


Exactamente!!!  In theory, Ognasty and even theymos should NOT be part of DT1 from time to time for some random upcoming months.  I would speculate that theymos did not exclude any member from such randomness, including himself.