I think the Verge messed up: the announcement said there would be a full-text RSS feed for subscribers, but they've actually added full article text to the existing feed, where normally I'd only get 2 or 3 paragraphs.
Their sister site Vox made a similar mistake; their RSS feed already had full text, but once they added the paywall I got the full text of articles that were paywalled if I tried to click through to the site. It's like Vox Media doesn't fully understand how its RSS feeds work.