There are several projects that will buy tokens back from the market to use in their platform. Some projects e.g. have B2B customers who will have contracts in FIAT and because of the contract the platform needs x amount of tokens. These platforms will have to buy these tokens through APIs from public exchanges. This now with centralised exchange is a security risk, cause they lose control over their funds. This is where DEXs and thus NEX will benefit these kind of projects a lot.