Depends what you mean by &quot;effective&quot;.<p>It&#x27;s similar to e.g. steam or appstore DRM: relatively easy to trivial to bypass (or you can access the content with bypassed&#x2F;removed DRM easily enough) but the system is convenient enough that most won&#x27;t care to do so unless and until it&#x27;s being repeatedly and widely (ab)used by the keys authority.<p>It won&#x27;t hinder the motivated and technologically inclined but they&#x27;re a small minority, meanwhile the scheme spreads, and if&#x2F;once devices or accounts get killed it&#x27;s too late.