Why not just throw out the questions. They seem useless, easy to cheat, and as commenters are suggesting there's a "pay to win" component. What are you really getting from these questions? Why is software engineering so different to other industries when it comes to interviews? Is there really a positive to this type of interviewing? Why not do what everyone else does and look at previous work (which in software we have a lot more considering GithHub), ask some questions relevant to the job, and see if the person has a personality match. Most jobs don't need the best of the best.

I'm not convinced the coding interviews have improved upon the standard interview style in any meaningful way.