FWIW the platform must respond to DMCA requests, by law, without it's own saying in the matter. They only can check if the request satisfies the minimum requirements of DMCA. Punishment for the enforcer wouldn't fly.
Platform must respond to valid DMCA requests. Valid DMCA requests are for copyright infringement - there is no such thing as a DMCA takedown request for circumvention tools, that still requires court involvement.