"To me, it clearly looks like it's designed to look like Twitter," said Rebecca Henderson, a computer investigative specialist with the Washington State Attorney General's Office. "I don't see how anyone could look at this practice and think it's not deceptive."

Twitter doesn't like it either. The site is confusing, said Twitter spokeswoman Carolyn Penner, in an e-mail. "We are aware of, and clearly not happy about, the site. We are working towards reducing user confusion."

Henderson says she started spotting the look-alike survey sites only in the past few months. You can view different versions of this theme by mistyping the or Facebook (acebook.com) addresses. The Facebook and YouTube versions can have the same audible offer as the Twiter.com page but are tailored to look more like the sites they imitate.

Affiliate marketers can make anywhere from a few pennies to more than $1 per visitor for driving traffic to Web pages, and so the incentive to be unethical can be overwhelming. , Steven Richter and Jason Swan, and a Canadian affiliate marketing company called MaxBounty, saying they were linked to spam messages that tried to generate traffic for online marketing programs.

Facebook says sleazy marketers are responsible for the ubiquitous "Win a free iPad" or "Win a $1,000 gift card" scams that have been circulating on the social network.