I just got some more info about then regarding referral promo.
Per the terms of the Black Friday promotion, new customers who sign up with a referral link will earn 0% APY (no Tier) until they have their first Direct Deposit at which point they'll be entered into Tier 1 (3% APY) when they have their first Direct Deposit (instead of Tier 3, which is what happens without the promotion). You must have a Direct Deposit in December to qualify for this benefit.
If you are not able to open the account and set up direct deposit before December 31st, there would be no benefit to you using the referral link, although the person who referred you would still earn a Tier Rewind.
Without the promotion, all new customers begin in Tier 3 when the first direct deposit is posted, which corresponds to an interest rate of 1% APY. All customers start here because we don't yet know what your savings rate is, which is one of the main factors in determining your next Savings Tier.
To qualify for Savings Tiers you need to have at least 1 direct deposit per month and save at least 5% of your total deposits.
See our FAQ for information on when Tiers update:
https://faq.hmbradley.com/hc/en-us/articles/360039135651-When-does-my-Savings-Tier-update-