My Thread Disappeared – Do I Need a Premium Subscription to Sell?

Hey, I just posted a thread about selling Apex Racing tokens, but it randomly vanished. Is there some rule I missed or do I need to buy a premium subscription to sell something here? Can someone help me out?

Your thread was spam flagged, I approved it now.

Sometimes threads are removed by admins due to spam or smth regarding you being new, untill an admin accepts it and reviews it most of the time.