On the initial choice yes. But on the second choice, that other door is a single door that is the sum of the odds of the other 99 doors. So you're second choice would be to keep the door you initially chose (1/100) or select the other door (99/100).
Remember, the host always knows which is the correct door, and if you selected incorrectly on the initial choice they will ALWAYS select the correct door for the second choice.
The Switch is the 3rd best selling console of all time, ahead of the PS4 by approx. 5 million units despite coming out 4 years after the release of the PS4. They may be #3 in terms of mindshare, but they have an incredibly dedicated fanbase that enjoy their products in spite of their behaviors towards them on the content creation side.
I guess the answer for that would be what did Person A spend the other 45 hours on, and is that extra unit Person 5 generated worth the additional 45 hours spent on it.
As a person who occasionally consumes TikTok videos, I feel like it taps into the same thing that the original StumbleUpon did; show the user fairly quickly a number of related things and give them the option to either consume more of that same thing or find something else that's related but also new. Same goes for Pinterest. They all share that core element of quick consumption of related things in common.
Remember, the host always knows which is the correct door, and if you selected incorrectly on the initial choice they will ALWAYS select the correct door for the second choice.