What does making her account private have to do with slave trade?

I don't get the joke

What is the pop culture reference I'm missing here?

Um...? 🤔

Yeah I don’t get this one at all.

I’ve seen so much times but I can’t understand, Can you please explain?

Can someone please explain?

Everyone's laughing in the comments with no explanation.

What does this mean

Everyone in the comments kept drawing lines and saying you LOSSt and no one would explain it

I dont get it

I've read this like 5 times and I still don't get it