Game/music/money/encryption is the mainstay, but also can there are other articles ...
This is a good practice....
such as some communitys, they limit some theme,
After people post content,
he feels that article is ok ,
But official thinks that it is not in conformity ,
Down his post,
So whether the content conforms to the theme, there is often a cognitive gap.
You can post what you like but no spam spam posts could be downvoted to zero BPC Rewards