I expect it’s the difference between the actual organization/staff, and people who sign up for their service. Much like Boing Boing is a small blog-bbs-thing even-though there are hundreds (??) of members who participate.
From another article: “The WFA was founded in 1953 and is headquartered in Belgium. The WFA started the GARM initiative in 2019. GARM has two full-time staff members, Business Insider wrote.”
