1. Are you seeing it multiple times per session? I believe that if you have an adblocker on, you should see it each time you come to FT, but only once.
2. If you are seeing it more than once per session, be sure your browser is not clearing cookies, because that will cause it to pop up more often.
3. And of course the best way to get rid of it is to turn off your adblocker, or whitelist FT on it