Just my tips for anyone to get away themselves from being called as a spammer:

• Don't post if you don't have anything to say: Most people are doing this mistake when they enter into a discussion, they simply post some sentences in general, to get their post count to be increased but if you have this habit then you could never rank up.
• Don't be lazy to read: Did you ever heard that intelligent people are good listeners? So get your knowledge increase by reading more and more contents as much as you can, more knowledge you gather the more chance to make a better suggestion while enters into a discussion
• Get yourself into a discussion: If you are creating a thread or replying to a thread keep watching the thread for further replies for your post and keep the discussion get going until the solution to be found.
• English is important: Yes, if you want to interact with someone on the internet you need to have basic writing and understanding skills of English or you never know what is happening in a thread and you will be stuck there forever.
• Be yourself: Just concentrate on improving your knowledge with the things you are good at, like if you are a trader then read more things about trading strategies and how to tackle the different market condition of crypto then teach others the things you learned. You can't post something good and informative if you never give an effort towards it.
• Avoid posting on Spam mega threads: even if you post some good post on 113th post chances of anyone would read will be less, so you can't expect to get merit for that good post.
• Avoid posting wall of text: If you want to say something which takes bit more characters to express then cut down the characters into multiple lines or paragraphs because if we see something which is really long to read, most of the people will simply skip. We are lazy in this modern world.

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Misc tip: You can use Grammarly extension to correct your mistakes while writing a post like spelling mistakes, simple grammatical mistakes, punctuation marks.