Well, if your keyboard is hotswappable and you have any spare switches, it could be a quick fix as long as you know which switches/keys are chattering and you have leftovers. I don’t know who (Mass)drop had actually manufacture the Halo Clear switches, it could be Gateron, but I don’t think they made that information public.
I am almost certain that steam keys are actually free to developers, which is the whole reason for the policy.