Great point - there will be a giant incentive to defect. I'm not interested in policing it.
I'm interested in raising the incentive for people to say no.
I'd do this by offering another job board for people who aren't likely to leetcode anyway. I would tailor it to people with great open source projects/ experience that might get looked over in a more traditional interview.
I would give this at least a cursory glace. This is how SO careers was marketed to me back in the day (regardless of whether or not that was true) and it ended up landing me in an interview process that was not as terrible as it could have been.
I'm interested in raising the incentive for people to say no.
I'd do this by offering another job board for people who aren't likely to leetcode anyway. I would tailor it to people with great open source projects/ experience that might get looked over in a more traditional interview.