i'm going to throw a wrinkle into this thought process:
i can think of one a pro (and Brian you can probably figure out who I'm referring to), who I believe has at some point or another, consciously decided, or perhaps calculated, that the value in sponsorship money was greater than the value add of a marginally faster piece of equipment that would yield marginally faster race results/payouts. i see this not only in his/her frame decisions, but also in other sponsorship decisions he/she makes - helmets, wheels, even down to hydration setups.
basically, rather than riding one of the fastest frames, fastest helmets, etc, etc, and maximizing opportunities to win races/earn payouts, i suspect he/she's figured out that it's financially more sensible to earn money through the sponsorship contract. and you know what? there's nothing wrong with that at all! this is a profession for all of these athletes, and sponsorship money, when it's an option, is often way more guaranteed than race payouts.
for instance, would i take a free Rudy Project helmet rather than pay $350 for whatever the newest "best" aero helmet is? Probably not. But if RP gave me the helmet for free and paid me a few hundred bucks - is that worth more than whatever cash payout i might win from winning X race?
we have also experienced showing up to a race ready to go, no second questioning our plan, only to have X, Y, and/or Z happen and totally blow up our results. so even if professionals focused only on optimizing equipment, potentially at the expense of paid sponsorship walking, AND having to pay for equipment out of pocket, seems a bit short sighted. pro's gotta eat.
----
@adamwfurlong