It doesn't have to specifically target eBay to have the effect one wants. One just has to go after characteristics of spamminess that they didn't prioritize before. Like i said in another post, eBay has been spammy for a while, but it was not penalized.

eBay and Amazon are huge spenders on Adwords according to this infochart (which may or may not be reliable): http://i.i.cbsi.com/cnwk.1d/i/tim/2012/01/24/google-earnings...