A referral program is an opportunity to earn extra bitcoins by distributing a referral link. According to the ECOS referral program, a user (referrer) who provides a referral link for registering new project participants receives 7% from the first purchase of the referral contract who registered using the user`s referral link and 5% from all subsequent purchases. The reward is credited in TH / s to the user`s account. The referral link can be shared with friends, posted on social networks, blogs, electronic resources, etc. The referral program is valid only for contracts from the calculator and does not apply to promo contracts.