The very first time I came to hive after signing up with my steemit account, I saw many Communities which happened to be paying and some are not but will only gain upvote from them sometimes. So, I did not know that proofofbrain has the ability of paying for using their tags and posting in their Community. I always use proofofbrain as my first five tags but not knowing how important it was.
My boss in school, 
So, it comes to a time where by he was in need of money. He called someone who he knew can buy his hive token and hive dollars. The person asked him if he had proofofbrain tokens. He was surprised because he never knew proofofbrain is a paying Community and so, he was shown how to check it. That was how he got to know that he was having enough proofofbrain token which he also sold to get the money he needed at that instant.
After knowing this, I became fan of POB and always make use of their tag and post using their Community.
How do I know if I have proofofbrain token?
Go to your wallet
Click on the wallet icon and it will direct you to your wallet to view what you have in your wallet.
When you are done with that, them click on the Hive icon.
It will bring out another roll just like the one below.
After that, click on the search engine
This place will take you totally to indeed your wallet, that is, it will show you all the paying Communities including #proofofbrain.
When you are done with this, you can scroll to the left to see your respective token.
Are you surprise to have seen that you have made some extra token right here?
I was also surprised to have seen that I have this kind of tokens in my inner side of my wallet. It's nice seeing all these.
Proofofbrain pays, so as other Communities. So, ensure to always use the proofofbrain and do not be lazy of using it. Recently,no have observed that many people are running from this Community and so was I until I found our their token rate.
Few people now post on proofofbrain and also are running from using the tag. Using the tag as your first tag can also give you some points.
What do I do with the token?
There is a way during which you can stake your POB token and at the end, you will be receiving a return. Or, you can sell to those who are ready to buy, if you want or have enough.