German police used tips from EBay Inc. to score the biggest success in their probe of a counterfeiting ring, snaring 20 tons of knock-off La Martina dress shirts, Ed Hardy tank tops and other brands. EBay, the world’s largest Internet auctioneer, is helping such investigations as part of a larger effort to rid its site of fakes the San Jose, California-based company says damage its reputation as a trusted shopping place.