Its like send me 0.1 BTC and I'll send you 1 BTC, but instead of BTC, its Merit coin. Oh yeah, theres currently no exchanges that trade Merit, except the Developers own in-house Market. Also, you can only make sell orders, no buy orders on this exchange. Also, this exchange of theirs is heavily manipulated!!!
It's actually an auction, there is nothing magical here. I'm sure you understand how auctions work. No unicorns giving you magical returns. It's about "Do you want to contribute to the development of the project or not". If you don't, then don't, simple as that.