To be pragmatic about this, TDP is still the largest audience for Dmax owners on the internet.
For anyone who's livelihood relies on Duramax customers, it's wise to be there.
However, at what cost? While TDP members helps sales tremendously, the shop must tolerate slurs thrown at them because there is only one "protected" sponsor. Certainly it hurts some sales. For the long term, it would be best if the situation was different, but it won't change from within TDP as long as the Pro-TTS admins remain. Since there is no expectation of that occuring, the only other alternative is to reach the same customer base through other means.
The customer base comes to the web to read the content. You move the content, you move the customer base. This is a "performance" board, and it's run by lunatics, so it's only suitable for a fraction of the DP customer base. But putting content on TDP works against the long-term interests of the vendors there, it ideally should be placed at other sites where the vendors are not harrassed. Wherever you put content, folk will follow.
I encourage all the readers here to post content at diesel sites, be it here or others. We have a list of sites somewhere in Smoke Signals. But for the long term health of the Dmax vendors, I suggest they avoid putting content on TDP unless there is change in the situation there. And I don't mean another speech by Nick D'amico that he has never done anything to support TTS or downplay the other vendors. Or another speech that he is changing the board policy. You can only use that one about 50 times before it wears out, and he's running at about 100 now.
Sure the Slick 50, Hyundai, and Tampon vendors will remain. But those who are actively seeking to buy Duramax parts and services will shop wherever they can get the most intelligent information concerning their purchases.