You could get 10$ for each referral, unlimited, and 40$ more for 10 referrals, you have to verify yout ID
By going to a referral link, you can get Minecraft for free, without major hassle. There is a guide thoroughly explaining the process. Referring users can get 10 points.
Exsisting Nationwide customers can refer their friends to the building society by switching their existing current account with another bank to one of Nationwide current accounts (FlexAccount, FlexDirect or FlexPlus) and bringing at least 2 active direct debits on the account over. If the switch is successful and the terms have been met, Nationwide will credit both the referring friend's and the referred friend's account with £100 within 30 days of the switch completion. Limit: max 5 invitation per tax year = max £500 referral bonuses a year. Full terms: https://www.nationwide.co.uk/support/support-articles/important-information/recommend-a-friend-closure/terms-and-conditions