Nexo just launched their new referral program with referrer and referee each getting US$10 in Bitcoin when referee deposits US$100 or more in any of Nexo supported digital currencies and holds this deposit for a minimum of 30 days. Referee must also pass the Advanced Verification step during sign-up.
Some info on Nexo:
Nexo is a crypto bank which accepts digital cryptocurrency assets such as Bitcoin, Ethereum etc. Nexo is seen these days as one of the big 4 crypto banks, alongside Celsius, BlockFi and Crypto.com. What makes Nexo different is they also accept 3 fiat currency assets - USD, EUR and GBP.
The deposit interest rates offered by Nexo are anywhere between 4-12%, including for the 3 fiat currencies above. For more details, see the table of rates in their link below: