I think it's a good idea that message boards and newsgroups be free of
commercialism. But it's not necessary for 100% rigidity; there can be a
little bending and flexing. I think an occasional announcement or special
offer, such as the one in this thread, is OK, as long as it's done by a
REGULAR, CONTRIBUTING MEMBER of the group.

Besides, those who voice their sincere complaints about it will help to keep
such activity in check.