If they're now blocking clicks from Google, doesn't that mean that they're cloaking and violating the Google's Webmaster Guidelines [1]? [1]: https://support.google.com/webmasters/answer/66355?hl=en
Google is not okay with cloaking, but they will whitelist publishers if the publisher specifically includes a parameter that declares if the site requires registration or subscription. This is done in the sitemap. https://support.google.com/news/publisher/answer/74288?hl=en
> News-specific tag definitions
> Yes, if access is not open, else should be omitted
> Possible values include "Subscription" or "Registration", describing the accessibility of the article. If the article is accessible to Google News readers without a registration or subscription, this tag should be omitted.