So even while Facebook tries to steal ad revenue from TV, it also may find itself forced by brand advertisers to work with the broadcast and cable networks whose revenues it covets.
Wander into any eighth-grade science fair and you're likely to see an example of this destructive process at work - place two dissimilar metals in an electrolyte solution and one of the materials will slowly steal ions from the other, causing it to oxidize, become brittle and eventually break apart.