Linking is very different from downloading or copying. A link is only a reference to the content, not the content itself. The news site retains full control over the content. If the news site wants to make more money from visitors, they can use ads or paywalls.
And of course it wouldn’t be Lemmy, the app, paying. Maybe not even Lemmy, the instance owner, or the poster since neither of them are profiting from that linking.
What if an instance is getting enough donations to be considered profitable? Drawing the line at profitability just punishes success and efficiency.
BTW a lot of posts in c/canada have snippets copied from the linked articles. How is this any different from FB and google showing links and snippets?