In my case, if they'd just made the "More" button say something like "More... (search again and display new results)" it would have been clear what would happen.

That's very much how new/intro users should be treated, if not all users.

And I would have subscribed. Alas, they didn't, and I just can't mentally clear the hurdle of paying money to a place which I feel deceived me. So, I didn't become a subscriber. :/