Why not send the user straight to the home page, and place the thank you notice, and the EXTRA link to preferences, at the top of the page, just as it appears, when asking to meta-moderate?
I find being sent to a blank page quiet annoying!
We've improved Slashdot's video section; now you can view our video interviews, product close-ups and site visits with all the usual Slashdot options to comment, share, etc. No more walled garden! It's a work in progress -- we hope you'll check it out (Learn more about the recent updates).
What good is a ticket to the good life, if you can't find the entrance?