Oh no, it was this (exact) one. I was completely off by an order of magnitude, and should probably edit my original comment... Apologies.

What happened, then: I also visited this page, and got this ad. I thought "What the actual fuck?", clicked on it, it took me to the linked page. Presumably the same one you got...

I then went to try and share the image in a post, here. But my phone immediately crashed, taking the screenshots, and the linked page, with it...

So I tried searching for it, and got nothing, except other vague threats of fines and jail time, for various "covid-y" things related to the border, presumably from the same agency. Followed the link again - it wouldn't give me this same ad, the next time.

Then I wrote my comment. Just from memory. I probably shouldn't have quoted it, going off my memory of something I had seen 15-20 minutes earlier, before my phone crashed...

Where the extra digit came in was obviously from my misremembering other fines I had seen, and having incorrectly seen the little A there (for AUD) as an extra number... :-/

It was only after I wrote that, that I was able to reload the page again, get the correct ad, and realise I was wrong.

So... After that very complicated explanation: tl;dr, I accidentally misquoted the figure, by an order of magnitude. Whoops. But you're completely correct, here.