Tip for new users. Do not write short messages. They are deleted. To prevent messages from being deleted, you must write long messages. My messages, which consisted of 10 words, were deleted. Activity = 0.
This is nonsense. It doesn't matter how short or long your posts are but posts are removed for breaking the rules which you should read about here:
https://bitcointalk.org/index.php?topic=703657.0Your posts probably consisted of short pointless messages like "thanks for this project" or just saying things like "watching", "great" etc and that's why they will have been removed. Stretching your responses out to 10+ words wouldn't have helped in this instance.