Signup http://www.justplay.co.za/ You will receive notifications about once a week with a code you can enter on the site to get Bonus Codes. You can then use those free codes to enter any of the competitions without entering any data.
Want to find places to enter competitions for free. Please share a link if you have something along these lines.
PM Zone has a couple of free to enter competitions monthly http://www.pmzone.co.za/win/
Popular Mechanics has free to enter monthly competitions that you can find http://www.popularmechanics.co.za/category/win/