Probably you bump ANN Thread. Look like moderator delete ANN Thread. They made another ANN Thread
https://bitcointalk.org/index.php?topic=4837182 .There are two bounty thread one has been locked, I don't know it's locked by moderator or by OP. I expect due to bumping service you got baned for display signeture. Moderator can clear your doubed.
May be you violet rule as say TryNinja below.
Quoted for more visibility.
Most giveaway threads are no longer allowed in the Alternate cryptocurrencies sections. From now on, posting or replying to such threads could result in being banned. Existing threads will be locked.
Specifically, you are not allowed to give people any incentive to post insubstantial posts in your threads. You can't offer to pay people who post their addresses, usernames, etc. You can do giveaways off-site and link to the giveaway page in a thread, but you can't give people any bonus for replying to your thread.
Similar threads are already restricted to Games and Rounds in the non-altcoin sections, but the giveaway-related post volume is so high in the altcoin sections that I've decided to just ban them entirely here.