Even finding and stopping one company may not do much about the larger problem. Experts say that trying to shut down such Web sites is like playing a game of "whack-a-mole" -- as soon as you hit one, another pops up.
A consumer's best bet, Women For Hire's Johnson said, is to watch out for themselves.
"I think especially given the economy, with more pressure than ever to find a way to generate income, more and more people are suspending the average common sense," she said.
"This is the time you have to be even more critical -- you have to be more vigilant than ever before," she said.
Google has compiled a list of tips on "how to steer clear of money scams." Find them here.
ABC News' Becky Worley and Carolyn Weddell contributed to this report.