I have accidentaly bumped into mintME some time ago and I have started exploring it. It has one unique concept that is that you can mint your own token and start trading with it. You have to set the supply, release period, webage etc. just like with standard token. You can make your own airdrop and other campaigns. I have started with my very own token Biteasy. If you would like to deploy the token to the blockchain is necessary to pay for it fee which is quite high in my opinion. If you deploy the token, then you can withdraw it to the external wallets and use it outside the mintMe.
I would not deploy the token unless you are willing to spent a lot of time preparing your token and than be sure it will really attract someone. The exchange is used to exchange this minted tokens for their native token MINTME (not necessary to be deployed on the blockchain) and then this token can be traded for ETH or BTC. The exchange has really small volume under 1 BTC daily, small userbase and is not definitely mainstream. It is really just for fun and I am not taking this exchange seriuously.