I feel confident that no system exposed to the internet should have a problem with 50,000 requests per month! If they do, they probably shouldn't run a public NTP server, or have a public IP address at all.
Okay, so you're just confident in exactly how many requests everyone else in the world will be making if you try to pentest resources unbeknownst to their owners.
Okay, so you're just confident in exactly how many requests everyone else in the world will be making if you try to pentest resources unbeknownst to their owners.