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Line 7:
Line 7: − + − We discuss Youtube first (source: {{Q|1236}})+
→How is "engagement" generated?
* {{Q|50}}
* {{Q|50}}
== How is "engagement" generated? ==
== History of Youtube systems ==
source: {{Q|1236}}
=== Scale ===
=== Scale ===
[[File:YoutubeBillion.jpg|frameless]]
[[File:YoutubeBillion.jpg|frameless]]