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Thank you for your input. I didn't see it from this lens. I guess we learn everyday. There is a lot of things I am still struggling to understand. From your explanation I see the activity system is not so much as a greater evil as I thought.
Yes, the activity and merit system are just perfect. It will be preferable and perfect for newbies to try and be patient before posting a thread about any improvement on this forum, at least be a full member. At the time, you will noticed what you were thinking otherwise before is rightly implemented on this forum.
Normally, if a newbie start posting, the activity will be counting along until after 14 successful posts, that is exactly what you mean, but after 14 posts, you will notice it is no more counting like what you are thinking, you still have 13 posts, that is the reason you do not know yet. After 14th post, it will only count every 14 days, even if newbie is posting often, when the activity is no more counting, he will have to stop if you think it can result to spamming. But, yet, I did not see how this will result to spamming as merit is what most newbies are after.