I am very careful with picking mentors and I generally just trust them to do their job. :-) It might not scale well long term, but that's the problem I don't need to solve right now. Right now if some lead tries to go directly to mentor, mentor always 1. Reports it to me; 2. Tells this lead to pay through mkdev.me.
It's simply much more convenient to mentor through mkdev.me than to do it on ones own.
It's simply much more convenient to mentor through mkdev.me than to do it on ones own.