It's incorrect to do that, and no leading accounting firm would sign-off those statements. The service provided by Lyft is not the taxi ride, but the arrangement of the taxi ride. Lyft is acting as an agent, not the principle, and consequently they can only recognise the booking fee, not the entire service.
"The service provided by Lyft is not the taxi ride, but the arrangement of the taxi ride."
You are right. I was wrong about how Lyft's customer agreement works. I looked up the Lyft T&Cs[0] and they specifically say:
"In exchange for permitting you to offer your Services through the Lyft Platform and marketplace as a Driver, you agree to pay Lyft (and permit Lyft to retain) a fee of up to 20% (the “Administrative Fee”) of the Ride Fees paid by Riders for such Services."
This makes it clear that Lyft is acting as an agent (like eBay) not as a principal (like Tarsnap).