Ads cost between $7 and $10 per day, and the women are paid an average of $88 dollars per day. The math makes that sound like a losing proposition, but the start-up claims to be doing fine.

“Genius! Can this work with other parts of the body,” one man asks?

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Not surprisingly, reaction to the walking billboards runs along gender lines. Vocativ reports men seem to be fine with the idea while women don't seem to be as amused. If you'd like to see some of the ads, click here.

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