How can you get free supershills on secretbuilders

You just click on bag o' shills and click on "Earn Supershills". Then you click on 'Invite Friends". You just type in an unused email address. Then you follow the steps and click send. Log out and go to the email address that you typed. Make a new account using the same email address. Then go to your real account and you will have 5 supershills. Keep on making more accounts but don't make too many or it will just stop working.
Or ask your parent to enroll you in secretbuilder school with a friend and you will earn 20 supershills. Of course the 2 easiest ways are just to buy supershills or become a superbuilder!