The advertising industry took a great leap forward after the Great Recession, but left actors in the dust. Commercial production broke records in L.A., last year but middle-class actors in ads are struggling to make ends meet. What else is new? Celebrities are taking spots once occupied by lesser-known actors. Lucrative network television residuals — the fees that actors get when their work is rerun — have eroded as advertisers shift spending to cable television shows like "Mad Men" and "Breaking Bad" that pay lower rates. And then there's internet exposure, which offers little cash for casts.