For all we know a City of Melbourne employee installed a free trial 10 years ago using their work email. That tends to be how these logo showcases work.
I think that's how Slack and Atlassian got so many logos for their websites. Look through the free tier for recognisable brands and download the press kit
That reminds me. I saw the other day you were saying your PC isn't that great. I've got a spare i7 board and CPU you can have. Can send it to you via mail if you want it.
It's pretty much gathering dust. Not too old either. I just can't remember the exact model of CPU.