I don't actually mind new Promotion forums but the problem is that everyone seems to be doing it wrong. They see that one promotion forum offers xxx features and then they create an exact duplicate of it with a different name. That is just unless because they need to offer something unique. Otherwise, why would people leave the bigger forum and come to yours? If you want to stay in the market, you need to be competitive and have a good unique selling point.
Think about this: If I create a duplicate of the iPhone 6 and call it the Zphone 6 with exactly the same features and price, why would people buy from me instead of the iPhone 6 which has built its brand. The answer is there is no reason to. The same theory reflects the issue with new Promotion Forums. I have seen some (although not many) promotion forums that actually offer something different but unfortunately, it seems like that they give up too easy when things are going downhill.