It limits the ability of a smaller store to hire a SEM superstar like you and try to get ahead a larger store in its market.
Yago,
We all know, dealers are like snowflakes, no 2 are alike. That goes for Internet Ad spending too. A "true" SEM superstar matches the dealers business profile to the marketplace they're in.
Example of Internet Advertising in 2 flavors:
--Big Store = Carpet Bombing
--Lil' Store = Precision Sniper fire
The Big store has 500+ units and they can buy short, expensive keywords that stretch out in a a big radius, maybe something like "Chevrolet Impala For Sale". The store has 60 New and 33 used impalas. They're ready for any any Impala buyer, new or used.
Our lil' Store has 11 Impalas and they
really need a high precision SEM superstar. The SEM superstar optimizes the ad expense by shrinking the radius, using the best ad copy they can create, point the ads to teh best converting pages and reduce bids to find that sweetspot (least ad$ with highest conversion rates). A SEM superstar may even shut off "Chevrolet Impala For Sale" and roll the monies into keywords that convert better.
A SEM superstar's job is to know their client, their competition, their inventory profile and spend the advertising money with "aggressive precision".
HTH
joe
(Note to readers: SEM = Search Engine Marketing IN this example, we're talking Paid Search ads)