The merit system is not perfect, but to fight spam and to let the reader get a quick idea about how much the author knows about the subject, the merit system is as good as it gets.
I think it’s a good idea to force everyone to do their best when they post here on BitcoinTalk, if we want blockchain to be a success, then we all need to be good ambassadors of blockchain technology. 

The merit system will make people go deeper into what blockchain technology can do. And our new wisdom can be used when we talk about blockchain, not just here on this forum but everywhere we talk about blockchain related subject, our knowledge’s about blockchain will get even more people to be interesting in blockchain.