Although on-line s are restricted in many states, land primarily based s in the United States are way extra widespread. https://cl-system.jp/question/%ec%95%88%ec%a0%84%ed%95%98%ea%b3%a0-%ec%8b%a0%eb%a2%b0%ed%95%a0-%ec%88%98-%ec%9e%88%eb%8a%94-%eb%a8%b9%ed%8a%80-%ec%97%86%eb%8a%94-%ed%86%a0%ed%86%a0%ec%9d%98-%ec%84%b8%ea%b3%84/