A variety of publishers are adopting Accelerated Mobile Pages (AMP) to speed up the performance of their sites on mobile. In fact, I’m using AMP to power my entire blog on both desktop and mobile and it’s significantly faster than my old, heavyweight site. But I’m a small time blogger and to get real publishers on board AMP needs to support a variety of monetization options - including ads and subscriptions - that are able to generate the same revenue they’re getting without AMP.
Blocking ads is one thing but being able to bypass a subscription paywall is quite another. It’s already possible to get access to the paid Wall Street Journal articles by reaching them through Google but that doesn’t always work and the Wall Street Journal can stop that any time. Being able to bypass AMP’s subscription functionality, on the other hand, is something that AMP needs to address in order to get wider adoption - especially by the premier publishers.