Referral links can be found when you have logged into your account on Lootcrate.com. Each time someone uses your personal link and completes a signup, you will earn $7 off a future renewal. Once you have logged in, click the Share tab at the top of the screen, which will bring up the screen below.
Click on the "Start Sharing" button, which will bring up a window with all of your referral information, such as your referral link. You can take that link and share it with your friends! 
Referrals are automatically moved to your oldest active subscription once the first crate has been processed on the referred account. Depending on the date the commission is earned and the renewal date for your referred account, it will be up to a full billing cycle before the discount is reflected from your renewal charge.
Only new accounts are eligible for referral credit. Any additional subscriptions added to an existing account will not qualify for referral credit. All credit will be applied to the oldest active subscription on the account or the most recent inactive subscription if no active subscription is available.