This is nonsense.<p>If my user base grows instantly because 5 users happen to sign up at the exact same time, then the growth rate of my user base in users per hour is 5/0, or infinite. In users per second, the rate is still infinite, etc.<p>I guarantee ChatGPT's growth rate was not faster, at any point, than my infite number of users per second. Equal, certainly, but not greater.<p>There is no such measure as "fastest-growing". It is nonsense peddled by idiots who want to attract eyeballs and sell soap, or else fools who don't understand math.<p>Fastest to a particular arbitrary milestone, perhaps. But who sets that milestone and what does it mean, really?<p>If I offer to give away a gold bar to everyone who signs up, I will likely be able to claim that my time to 100 million subscribers was the fastest in history.<p>Those users will likely remain active right up until they find out there are no gold bars. So what does that growth mean? Nothing, that's what.<p>I wish humans would stop and think for a minute about what rubbish they are taking in.