12 of analyzed source URLs are restricted behind paywalls or login walls

Of the 112 source URLs found across all claim types, 99 are alive and returning content. 12 are restricted behind paywalls or login walls. 1 is dead. Of those that resolve, 47 are fresh, 4 are stale, and 1 is aging. When a source URL exists, it almost always works. The problem is upstream of link rot. The links were never there.