Is that article trying to argue that 500M people every week are visiting ChatGPT for the first (or second) time after reading about it in the news?
If I'm being incredibly generous I will concede that this could have been the case for the first few weeks when it was making headlines, but it clearly isn't true now.
It would be literally impossible to keep up these figures for as long as ChatGPT has without a ton of repeat users. There simply aren't enough people/devices.