SAO PAULO (Reuters) - On a Thursday night last September, Uber driver Osvaldo Luis Modolo Filho accepted a ride request from a teenage couple on the eastern edge of Sao Paulo, to be paid in cash.<div><a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=bWyhEdj5vGY:LP2-21ijNN8:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?d=yIl2AUoC8zA" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=bWyhEdj5vGY:LP2-21ijNN8:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=bWyhEdj5vGY:LP2-21ijNN8:V_sGLiPBpWU" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=bWyhEdj5vGY:LP2-21ijNN8:-BTjWOF_DHI"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=bWyhEdj5vGY:LP2-21ijNN8:-BTjWOF_DHI" border="0" /></a></div><img src="http://feeds.feedburner.com/~r/reuters/technologyNews/~4/bWyhEdj5vGY" height="1" width="1" alt="" />