Chrome ranking: the Network's shared-service traffic does not outrank destinations

ddiff --git a/server/chrome/service.js b/server/chrome/service.js
iindex a3743a7b..61b9be29 100644
---- a/server/chrome/service.js
++++ b/server/chrome/service.js
@@@ -47,7 +47,10 @@ function createChromeService(db, config, analytics) {
          try { const own = analytics && analytics.getStats({ days: 7 }); if (own && own.summary) sources.push(['network', own.summary]); } catch { /* */ }
          for (const [name, sum] of sources) {
              if (!sum) continue;                                   // unreachable: keep the last known score
--            scores[name] = Math.round((Number(sum.total_pageviews) || 0) + 4 * (Number(sum.unique_visitors) || Number(sum.total_unique_visitors) || 0));
++            const views = Number(sum.total_pageviews) || 0, people = Number(sum.unique_visitors) || Number(sum.total_unique_visitors) || 0;
++            // The Network serves sign-in, themes and shared scripts to every other site, so its visitor count is
++            // everyone's. Only its own page views count, at half weight: it is the account desk, not a destination.
++            scores[name] = Math.round(name === 'network' ? views * 0.5 : views + 4 * people);
          }
          // Signed-in history covers every site (community has no analytics endpoint) and names the tools people use.
          let tools = rank.tools || [];