Trader beware, this will likely get subjective.
This resolves to my best guess as for what percentage of Switch 2 buyers in the USA also buy the official camera accessory. This will be based on information available online, in rough order of priority:
Nintendo financial reports
reporting about Nintendo on the US market
reporting about a large US retailer
surveys by respected research firms
[cut line, evidence below will be ignored until 2027]
reporting about Nintendo on the global market
reporting about a large international retailer
[cut line, evidence below will be ignored in all cases]
online polls, anecdotes
I will resolve no earlier than 2026/1/1 even if high quality data is available. From that day onward, I will resolve as soon as I'm happy with the quality of evidence. If no resolution is reached by 2027/1/1, I will allow a lower bar of quality.
I will trade on this market unless it's clear that the resolution will fall between two buckets I have to make a judgement call on.