How does this trick work and why is it dangerous?

Curiosity trap: The post intentionally doesn’t show any images (or only blurry details) to pique your curiosity.

Comment trap: If you click on the comments to find the answer, you won’t find advice from your grandmother, but rather a link to a dubious website.

What are these sites about?

Fraudulent sweepstakes (e.g. “You’ve won an iPhone; enter your card number to pay for shipping”).

Selling overpriced junk (miracle cures, non-existent energy savers).

Phishing and viruses that try to steal your Facebook or bank account information.

Spreading the virus: As soon as you click on the link, a fraudulent system can take control of your profile and automatically share this text on your behalf in various groups without your knowledge.

What to do?

Under no circumstances should you click on the link in the comments.

Do not respond: Do not like or comment on the post (any interaction increases the reach of the post and allows more people to see it).

Report the post: If possible, report it to the group administrators or directly on the social network as spam/scam.

It seems that the account that shared this post has either been hacked or is an automated bot. Be careful!