Hi @davidesimoncini, thank you very much for your explanation. It's very nice of you to reply to this post. Now, I understand a little about the situation, because @spaminator just downvoted all our posts without giving any message.

And I'm relieved that we can still continue posting here although not receiving any rewards. I'm just little worried that nobody will see our posts because they're heavily downvoted.

I will try your recommendations and keep posting here. Hopefully one day @spaminator will change his heart and stop downvoting us. Best regards.