I'd also like to draw attention that a lot of this work was sponsored by IMC the market maker, Mihai's employer.
But just to set it straight, GpuOwl received exactly $0 contributions or sponsoring from exactly nobody. It's a pleasure work from my side, and it's open sourced for the easy access of curious minds to the algorithms and techniques implemented. I did receive great help, in the form of source-code contributions, most importantly from George Woltman.