The problems are real. I wrote a simple contract that validates a solved sudoku and rewards `sudokoin` for it. But even at the time of deployment, running it cost about 1$. Now it is probably closer to 10$.

On the other hand, once the contract is deployed and the code open sourced, you can pretty much prove that you cannot manipulate your own creation anymore. It will probably be even better once there are other languages than Solidity to develop for the EVM.

I wrote a blog entry about my experiences and the second iteration on another platform at medium: https://medium.com/@jraedisch/the-path-to-sudokoin-6aee92cfa...