I've honestly not noticed much difference in spam filtering with free email accounts these days. At least those from the 'big providers' like Google, MS, Yahoo, etc. Heck, even SpamAssasin (formerly SpamYourAss) is decent the past few years.
If you push the "extra ice" button on the soft drink vending machine, you won't get any ice. If you push the "no ice" button, you'll get ice, but no cup.