The two cost structures
Real-device view delivery requires the same source-account infrastructure as likes plus the bandwidth cost of actually playing the video. Each view consumes 3-15 MB of video data on the source-account device. The per-view sourcing cost works out to ~$0.002 at large volumes. Iframe-loop bots have no source-account cost and use server-side bandwidth at datacenter rates — ~$0.00005 per view, effectively zero.
