I don't understand the following:

"Yelp passed 100 million reviews in March 2016. Imagine asking two questions. First, “Can I pull the review information from your service every day?” Now rephrase it, “I want to make more than 1,000 requests per second to your service, every second, forever. Can I do that?” At scale, with more than 86 million objects, these are the same thing."

Who is making 1000 requests per second to retrieve all of the 100 million reviews? Other services within Yelp? Why would they pull all reviews every time, and not just the reviews they haven't already processed?

How is 1000 requests per second the same thing as pulling all review information every day?

This section is really confusing and needs some clearer explanation.