The comma after Facebook is really pissing me off.
Yeah, this seems to be a thing a lot of news headlines do. So annoying

Maybe bc I’m not a native speaker but I don’t get it. Is a comma equivalent to an ‘and’? This is how I read it anyway.

And it is indeed super common in headlines. Maybe to keep word count lower?

You only use a comma when listing 3 or more items. Milk, eggs, and cheese. Saying "milk, cheese" is lazy and just reeks of a writer who thinks they're too good for the rules.

Maybe to keep word count lower?

This is it, even though it's completely unnecessary.

"the rules"?

You do know there is more than one style guide right?

It is from a time when physical space to fit the actual printed words was at a premium. However, these days it is kept mostly by traditional journalism outlets as brevity in a headline isn’t just about space on a page but in quickly summarizing.
That makes the most sense to me: a relic from printed news that editors continue using in order to feel like editors.
That's pretty standard formatting for a headline.
It's not permissible in regular English Grammer, but it's used in headlines, which have somewhat different rules. I'd guess that you're not a native speaker -- I used to hang out on /r/Europe a lot, which had a lot of people who spoke English as a second language, and they all had tons of people saying that they couldn't understand newspaper headlines.