The fact that the metric here is "Market Share" tells me that this is most likely a big nothing burger.

Market Share makes sense if you're talking about retail, or browsers.. but a static recurring payment? Why would Netflix care if a customer decides to also pick up another streaming service, effectively cutting their market share in half, while they keep full revenue.

There's a dozen+ streaming services out there that people have picked up, but in my personal experience, very few, if any, people I know have cancelled Netflix- they're just spending more and more money on streaming as time goes on.