I would assume it falls under fair use. I had the same reaction until I realized, as cool as it is, you only get the cover. Every article on a page ends with a "turn to page A9" type of prompt and since those pages are not part of this they're not distributing the whole article.
This is really cool. I've been brainstorming how to build an app that allows you to browse major newspapers by country/region so you can easily get exposed to news in other places. I think it would look something like this site. If someone does this first or this site becomes like that (it needs an index and grouping system) I'd love to hear about it.
I should be able to search on some tag like 'Afghanistan' and get the pages from the papers around the world with articles on it.
Likewise for yesterday's pact US/UK did with Australia : Would love to quickly scan what the editorials in US, Europe, China, India etc have to say on it.
This is a nice tool. I wonder, if with some additional bells and whistles, like machine translation, bookmarking, and tag search, this could be a product people would be willing to pay for.
https://www.tomorrowspapers.co.uk/