Theymos never said anything about it being commerical or not(unless I missed it somewhere(?)), and I didn't go hunt/ask for people to come advertise to my thread. If people are unhappy with the advertisements, I would be happy to remove them; and also refund the money back to Little Mouse.
If I can remember correctly then I think Theymos once said you are free to advertise on the topic. In my opinion there are no harm. We have seen many topics to have advertising space. I am not going to find them (I would if I had time to back up my claim).
I think the topic needs traffic. Wish we had some data to see how many visitors we have in here.