>How could Tribal affect a profit margin negatively?
The pre's are using the system resources for free (at the expense of paying players / profit margins).
If all players were playing pre's instead of paid events how long before the system collapsed?
Well, I understood that you were saying that they don't support the casual format because of negative impact. The negative impact you show above is because they
do not support he casual format. If they were better stewards of casual play, and there were an official venue for tribal classic (maybe a tribal league?), then we would not need a Pre, would we? Then that potential lost revenue would flow back to them.
So, again I say, it seems they only lose revenue by failing to support the casual formats. Granted we don't have numbers on how much the cost (monetary or manhours) of setting things up would be. However, they already used to have the deck check coded, the league base is coded. Also, once it is set up it will just continue to draw more tickets without further manhour requirements*.
TLDO: Not supporting seems like the worst all around business decision, and they continue to fail to communicate what other reasons on which they might be basing these abysmal decisions.