I don't really support this as I don't really consider a certain amount of posts to be an achievement.
Anyone can just go around spamming posts for post count, but it's all about whether you're HQ or not.
Then it will get flooded with, "I JUST BOUGHT RG ELITE!"... is spending $5 really an achievement? Sure, you donated money to the forum and every penny counts, but it's not an achievement.
Very rarely will someone post a real achievement, so I think the lobby is good enough. But then again, what I say really doesn't influence the final decision, just simply my opinion.