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Hydra Networks has announced that with immediate effect it has terminated the accounts of over 15,000 publishers. The news comes as part of a new push by Hydra to attract mainstream brand advertisers and set themselves apart from “ad networks peddling nutraceutical diet remedies, cash grant opportunities, tooth whiteners and other non-branded campaigns of low consumer value.”

After a year in which the performance marketing industry had to deal with controversies ranging from Oprah to the FTC, many of the larger, smarter networks are trying to move to higher ground. They’re seeking to attract more quality, brand advertisers, but that means selling performance marketing as a solution to Chief Marketing Officers who may have no experience of it.

As Facebook pushes to Win The Internet, its dazzling growth in usage is still to be reflected in profits, or even revenues. Accurate estimates of exactly what Facebook is bringing in are hard to come by but the best yet now comes from the Inside Facebook blog.

On Wednesday Spanish authorities announced the arrest of three alleged ringleaders behind the Mariposa botnet. Mariposa is possibly the largest botnet yet discovered and consisted of an estimated 12.7 million computers.