{"license":"https://creativecommons.org/licenses/by/4.0/","dataset":"atlas","mode":"workspace","updatedThrough":"2026-08-15","citation":"Antitrust Radar, Atlas Research Workspace: Tumblr; U.S. social-media referral traffic (2026-08-15); 2 canonical profiles and 1 declared supporting edges.","guardrail":"The workspace assembles canonical profiles and declared Atlas edges for research navigation. A direct edge preserves only its encoded evidence statement. A multi-hop route does not establish a direct endpoint relationship, make unlike measures comparable, define a legal market, assign ownership, control, liability, or causation, or prove a policy effect.","filters":{"duplicateItems":[],"items":["participant:cmp-tumblr","market:mkt-social-referral"],"itemsMatched":true,"requestedItems":["participant:cmp-tumblr","market:mkt-social-referral"],"truncated":false,"unmatchedItems":[],"layer":"all","layerMatched":true,"view":"map"},"diagnostics":{"bridgeDependenceRate":0,"confidenceCounts":{"bounded":0,"high":0,"low":0,"medium":1},"connectedPairRate":1,"directPairRate":1,"layerCounts":[{"count":1,"layer":"measurement"},{"count":0,"layer":"organization"},{"count":0,"layer":"enforcement"},{"count":0,"layer":"research"}],"sourceBearingEdgeCount":1,"sourceCoverageRate":1,"transitNodes":[]},"summary":{"bridgedPairCount":0,"connectedPairCount":1,"connectorNodeCount":0,"directPairCount":1,"disconnectedPairCount":0,"layerCount":1,"ledgerEdgeCount":1,"nodeKindCount":2,"pairCount":1,"selectedNodeCount":2,"sourceCount":1},"selectedNodes":[{"id":"participant:cmp-tumblr","kind":"participant","label":"Tumblr","shortLabel":"Tumblr","description":"Social-media referral category reported by StatCounter.","href":"/participants/tumblr","metricLabel":"Latest sourced share","metricValue":"0.29%","detail":"1 market / 4 rows","status":"estimated_public","year":2026,"color":"#3b82f6","searchText":"tumblr social-media referral category reported by statcounter. u.s. social-media referral traffic","connectionCount":2},{"id":"market:mkt-social-referral","kind":"market","label":"U.S. social-media referral traffic","shortLabel":"Social referrals","description":"Social-platform concentration based on U.S. page views referred from social-media sites to StatCounter-tracked websites in April 2023-April 2026. The series measures outbound referral traffic, not platform users, time spent, advertising revenue, engagement, or an antitrust market.","href":"/markets/us-social-media-referral-traffic","metricLabel":"Latest HHI","metricValue":"4,995","detail":"United States / 2026","status":"estimated_public","year":2026,"color":"#14b8a6","searchText":"u.s. social-media referral traffic social referrals digital platforms united states social-platform concentration based on u.s. page views referred from social-media sites to statcounter-tracked websites in april 2023-april 2026. the series measures outbound referral traffic, not platform users, time spent, advertising revenue, engagement, or an antitrust market.","connectionCount":21}],"connectorNodes":[],"pairs":[{"id":"participant:cmp-tumblr--market:mkt-social-referral","leftId":"participant:cmp-tumblr","leftLabel":"Tumblr","rightId":"market:mkt-social-referral","rightLabel":"U.S. social-media referral traffic","status":"direct","directEdgeCount":1,"shortestHopCount":1,"alternativeShortestPathCount":0,"primaryPathNodeIds":["participant:cmp-tumblr","market:mkt-social-referral"],"primaryPathEdgeIds":["market-participation:mkt-social-referral:cmp-tumblr"]}],"sources":[{"edgeCount":1,"href":"/sources/statcounter-social-referral-us-2026","id":"statcounter-social-referral-us-2026","label":"Social media referral share in United States of America, April 2023-April 2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=social_media&region_hidden=US&granularity=monthly&statType=Social%20Media&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1"}],"rows":[{"id":"market-participation:mkt-social-referral:cmp-tumblr","layer":"measurement","relationshipType":"market_participation","relationshipLabel":"Source-labeled participant","fromId":"market:mkt-social-referral","fromKind":"market","fromLabel":"U.S. social-media referral traffic","fromHref":"/markets/us-social-media-referral-traffic","toId":"participant:cmp-tumblr","toKind":"participant","toLabel":"Tumblr","toHref":"/participants/tumblr","evidenceLabel":"Social media referral share in United States of America April 2026","evidenceDetail":"Tumblr appears in the Social referrals source row for 2026 at 0.29%.","sourceId":"statcounter-social-referral-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=social_media&region_hidden=US&granularity=monthly&statType=Social%20Media&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"medium","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A participant link preserves one source-labeled market row and period; it does not establish corporate control or a current legal market boundary."}]}