For a few hundred million in the world it's soccer, for billions of people, it's football.

I think the parent was legitimately uncertain which one you meant. After all, this is a discussion about an article on American football on a forum hosted by a US-based company.

For me it's "football", I was looking for disambiguation. People in the UK often hate USA-ians calling it soccer, despite that name coming from the UK. The comment was a question, hence the punctuation.