If I'm not mistaken (and I may well be), Megaupload was hit because it had at least one server in the U.S. and because the entertainment industry is on a tear about piracy. I believe Fiverr's servers are in Israel.
However, Google is fully capable of deindexing any site in the world if they suspect fraud. Look what they did to J.C. Penney for a time.
What do you think: Is Fiverr in danger and should it clean up its act?