Our policy on that type of advertisment, is that we will generally allow it if:
- They aren't spamming the link in multiple forums
- It isn't for some sort of banned service like RMT or powerleveling
- It is of some possible interest to the community
It's definitly a grey area, and really situational. Obviously if its a major company and they appear to be gearing up for a major ad spamming campaign in our forum, we're going to have problems with that. The odd contest announcement and the like? I'm ok with that.