This approach was popularized (even if not pioneered - not sure who came up with the idea originally) by Tim Ferris in the book "The 4-Hour Workweek". He stoppe

This approach was popularized (even if not pioneered - not sure who came up with the idea originally) by Tim Ferris in the book "The 4-Hour Workweek". He stopped short of actually accepting payment though, and took an attempt to purchase as validation.