Serps full of spammy results

[ragman]

Most of my targeted keyword phrases for my site include the word vintage, so I often check the serps for various things like "vintage tablecloths", "vintage pillowcases" etc.

Recently I've begun to see numerous spammy results on Google that redirect to eBay from static pages of item titles/prices, also presumably distilled from eBay. Dozens of different domains, all with the same method, all registered to the same owner. Doesn't google penalize redirects? They say the user should see the same thing the spider sees, right?

For vintage pillowcases, the first 20 results have 8 entries from 6 domains, more results from more domains scattered through the rest of the serps as deep as you care to go. Yahoo and MSN don't show these results. Is their filter better, or are these too new?

Assuming Google does find these spammy redirects and bans them, will they only be replaced by more listings from more domains? Does this pay for the guy who set it all up?

I guess it's not too much work to generate numerous pages from a database, put them up on lots of domains, and redirect through your affiliate link to someone who'll pay for the traffic, but it sure seems like shady practice to me, and you'd think Google would want to keep their results cleaner, no?