It is a giant red flag to hear someone talk about requests per day. A day has 86,400 seconds. If you had 3 million requests in a day, that's only 35 per secon

It is a giant red flag to hear someone talk about requests per day. A day has 86,400 seconds. If you had 3 million requests in a day, that's only 35 per second on average. If you had 20 instances, that is under 2 requests per second per instance. I don't know what each request does of course, but it might be worth asking if each one should really take a billion clock cycles to complete.