Casino tourism has also grown to become a significant contribution to the economy in Northern Cyprus. They were first opened in the 1990s, and have since become very popular with visitors from Turkey and the rest of the island, where casinos are banned. This has led to huge investments in the casino sector. However, the sector has been criticised due to claims of its lack of benefits for the small and middle-scale business and shop owners. The "nightclubs" that have been established for prostitution attract sex tourism to Northern Cyprus and the industry has been described as a "civilized one", despite the sex workers being described as "vulnerable to abuse".