>> Typically, books like this cost between $20 to $30 >> ... too valuable not to share >> ... generosity >> ... share >> ... minimum contribution of FREE >

>> Typically, books like this cost between $20 to $30 >> ... too valuable not to share >> ... generosity >> ... share >> ... minimum contribution of FREE >> ... suggested contribution of $19 This is too weird. Is this some kind of social experiment on price framing ?