trading while mining ? this was the first time i hear a kind of exchange that got this feature although i saw other exchange before that you can play gambling , chat while trading .
No you are getting it wrong.
Like I have previously posted, a group of exchanges started this thing that the investors of that token will be getting a share of the trading fee based on the proportional share of their tokens. So whoever wants to take part in this had to buy the token, hold it for long time to generate enough ROI and then probably sell it.
Now this is not anything like legal equity, it is a risky investment and people need to be careful, because I have seen exchange go rogue and scam their investors after a few months - like nexybit. But this is a side effect that people got greedy about passive income and bought large volumes of the token.