How do MoV and Entrepreneurship policy interact?

Merchant of Venice already gets twice the gold (and influence) from a Trade Mission than a standard great merchant.

When you adopt Entrepreneurship with Venice, does the double gold from that compound with the bonus that MoV already receives?

So what I'm asking is, does a MoV with entrepreneurship earn 4 times the gold as a standard GM, or only 3 times the gold?

yes. MoV trade mission with Entrepreneurship earns 4x gold:

http://www.megabearsfan.net/post/2014/05/15/Civ-V-Venice-strategy.aspx

Insane!!!