No.
Servers that focus on more general topics (visual novel, shmups, etc) usually have a dedicated channel for promotion, so I don't see the problem.
But if it's a server dedicated to a single game, then it really doesn't make sense to ask to promote other games there.
If you have a server for a specific game, the problem is that most of the people who come to promote it aren't actually members of the community, but rather people who simply want to spam and take advantage of the server's visibility.
In a small community, it wouldn't be a problem, because most users know each other and it's easy to tell when someone is spamming, but in medium to large communities, it's difficult to make that distinction, so it's best to prohibit it.