Its the way nicehash works... I will not go into detail here as it is written clearly on their own site.

But.. in short... you can buy hash rates and direct them to a pool.  As I have faith in the coin I upped and downed the rate as I was running out of funds for the hash rate purchased.

In short, this is not cheating and is cheaper than buying the servers you have.

We all have our own hardware or rig rentals.  Investigation is the key