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by manigandham 3449 days ago
> selling a dollar for 99 cents

They are definitely not doing that. The sheer amount of profitable arbitrage proves that point. Ad networks remain one of the best business models around, this is what Facebook is. The main problem is that there are no real barriers to entry or oversight which leads to thousands of poorly run, unscrupulous, spam/malware infested networks which make an outsized impact on both the market and consumers.