It seems like this would not be possible: https://stackoverflow.com/questions/37334942/how-to-avoid-la...
Maybe a piece of JavaScript on the opened page could close the page? In that case you would see the page open and then immediately close. Though it may seem to some users that their rating submission failed.
I should probably add more useful information to the opened page. Right now it says "You will see more content from 2 RSS feeds and 3 people that recommended this". But I could add links to the item details page that has related recommendations. Or I could add links to the RSS feeds so you could explore them more.
Its growing faster than my RSS feed atm and that has over 1k feeds in it.