Sorry, thats not correct. The only person who gets compensated for performing computations are the miners. Everyone else performs computation so they can have an up-to-date blockchain, but are not compensated.

Ethereum is the most expensive computational environment you can imagine. However, it is also the highest trust. Its not for computationally-limited (gaming/data analysis) its for trust-limited (financial applications/privacy)

There is an effort to build a computation market on top of Ethereum, but the computation happens off the chain.

https://github.com/pipermerriam/ethereum-computation-market