Confusedabout ads posting on classified website

i really very confused about classified ads posting. so i have asking some question.

  1. i want to know that is it necessary to select your location when you are posting ads and also post ads in that your location category where you leave.
  2. for example i am Web Developer and i live in India this service not only for indian and i want projects from any other country not only from India but problem is we can not post ads in any other country location because phone verification is necessary on 90% classified web. what the hell is this?
  3. how can i get projects all over the world by using classified web and if you know any other tips so please share.
    please give me the answers
    thanking you