They're artifacts from a more naive time on the internet. Meta has announced that they're going away next year on Feb. 10.

One way to identify brand mentions is to search by company name using the TLD segmentation technique. Making a broad search ...

Ending support for these features marks the end of an era for Meta and Facebook. External Like and Share buttons were ...

So are external comment buttons, according to Meta. They’ll be discontinued on  February 10th, 2026, and starting on that date, they’ll render instead as a 0 x 0 pixel to prevent causing errors. [Link ...