Ive now introduced a Referral System to the website. your referral code is on the referrals page here https://www.miningforfree.com/referrals.php. But can also be found by clicking on the referrals link near the top of the page under the adverts or via the FAQ Page.

Its a 2 tier system:
People who you directly refer (Tier 1)
People who your refers refer (Tier 2)

You earn approx 6% from Tier 1 & 2% Tier 2

More details can be found at the referral link above