It's entirely possible they aren't American. Remember, the internet is global.

In the 90s and early 2000s, people, even from other countries, typed it correctly on the internet. I have the EFnet IRC logs right now on my hard drive if you need proof. Hell I'm tempted to make a youtube video just to prove my point.

Here's a foreigner who made the mistake in the 1930's: https://www.britannica.com/event/Lindbergh-baby-kidnapping#/...

I'm amused how mad you got about this. I wish my life was that luxurious that all I can be enraged about is where people put their dollar sign.

Yes, nothing convinces people like an angry YouTube rant about how "kids these days" don't appreciate the bad old days of the internet.

There are folks from all around the world online, and many countries place their currency symbol after the amount.

But the post in question was giving an amount in US dollars, and the US isn't such a country.

Habits die hard.

Like thinking people in other countries are kids in your own country.

In English that's correct but this is a common mistake for ESL people.

Hmm, I'm a grammar pedant and that one has never bothered me except in formal prose (real journalism, marketing copy, books).

It's spoken that way ("one-hundred dollars") so it's actually kind of intuitive to write it that way, even if it's technically 'wrong.'

Oh really? Then why don't we say QUESTION MARK or PERIOD verbally for each sentence of you think the $ literally means "dollars?"

because we have other clues for that. A question is denoted by a raise in tone at the end of the sentence. A period is denoted by a pause.

Probably people from other countries where currency typically goes behind the number like 100€.

And yet you still understood what they were saying. It's not that serious.