The author's test proves the theory; it doesn't falsify the theory. The test could only prove the theory or fail to prove it. Failing to prove is not the same as falsifying.

Not sure if you are intending to disagree with me. But I agree with you: it is a falsifiable claim, which is good.

If we're discussing falsifiability and logical reasoning, perhaps let's get more specific with terms. The author has a hypothesis, rather than a theory. "Theory" would be a lot more rigorous than just conjecturing this one thing.

https://en.wikipedia.org/wiki/Theory

https://en.wikipedia.org/wiki/Hypothesis

Maybe if you do it enough, sounds like he did it once. Another possible explanation: Multiple people just checking for a ride in a certain area is a good indication that there's about to be high demand and Uber might use that as a signal to increase price.