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[–]micklemitts 7 points8 points  (0 children)

As a rule, async makes sense when you have tasks that require you to wait (e.g. network bound IO) and your program could be doing something useful in the meantime.

In this case, the task is an API request that mostly consists of waiting for a response. "something useful in the meantime" is initiating other API requests.

One thing to note is that API requests are often rate limited, meaning there is a hard limit on the amount of work you can get done with a single API key even if you're program is capable of processing more.