Federal prosecutors say that Backpage brought in a half-billion dollars since it began in 2004, mostly through prominent risque advertising for escorts and massages, among other services and some goods for sale.

U.S. law enforcement agencies have seized the sex marketplace website Backpage.com as part of an enforcement action by the FBI, according to a posting on its website on Friday.

Backpage, which hosts everything from child care to real estate ads, shuttered all adult sections in the U.S. on Monday, hours before a U.S. Senate committee released a report alleging the site has created a lucrative marketplace that makes child sex trafficking easier.