OK so I've been following this, not participating much since I haven't had time. But now it seems "we're" quite stuck. So going back to the last clue, the audio message, I came up with thoughts, don't know if it helps any:
"YC" could refer to
Y combinator, a program that funds start-ups (typical Silicon Valley thing), from searching their web site I've found at least two job listings from Tesla here - that is Tesla looking for engineers and programmers and such. None of these were new. However, my thinking is that "one of Leon's YC todies" could be an employee of Tesla (everyone at Tesla is kind of "Elon's todie") who has come from/via Y Combinator? Now, I've been researching this but I haven't been able to come up with any connections, but maybe you need some more insider knowledge to decipher this one? Not sure how that would help anyway towards the understanding of the colors-points system/quest.
Also, "no biker" could refer to the fact that in Tesla factory they all ride their bikes around all the time, right? So we see on all the reports from the factory, and something they seem proud of. We've seen Elon do it, Gilbert Passin does it in the NG documentary etc. etc. Now, do we know of someone within Tesla who explicitly
does not ride a bike [around the factory] for whatever reason. Maybe this is the person who we should send "our proof"?
Sorry if this is just all ramblings.