a16z's @droovg reveals how a single endorsement helped him break into Silicon Valley, and why he's now trying to give overlooked talent the same opportunity: "Being at MTS, that was really my first experience in San Francisco. I really could only get into the startup ecosystem as a whole because Brent, the CEO of MTS, cosigned me, in one way." "With anyone being able to nominate, anyone being able to vote, we hope that a lot of operators that are under-recognized by the public but have great…