Welcome along.
Just to clarify the 15 post rule, it's not that you can't swap with someone who has an ad to sell or swap something, it's just that you can't place your own an advert, with fewer than 15 posts. This is simply done to stop anyone barrelling up and using the forum to flog stuff without making at least a small contribution to the place first. Obviously spam doesn't count towards the 15 posts.
Having read your feedback though, I'll mention it to the team for review