Do people in other countries have to pay to visit the page?
It's a bit more complicated than that. BBC in the UK aren't allowed to operate outside their charter - they're severely restricted in how much they can compete with private commerce.
BBC Worldwide is the beeb's commercial arm, who do exactly this - outside the UK, where they're competing fairly as any other commercial venture.
So Worldwide aren't allowed to operate within the UK precisely because of the licence fee - it'd be unfair competition. It's not just because they're shown ads - it's simply because the content is produced by their commercial arm, so finds itself on the wrong side of the home/worldwide silo.