Digital-only banks like Chime are seeing record signups amid the coronavirus pandemic. Here's how they drive revenue without lending or charging overdraft fees.

· Digital-only banks, or 'neobanks,' like Chime are seeing record signups for their online banking products amid the coronavirus pandemic.
· In the traditional business model for banks, they take in deposits, then lend that money out and charge interest.
· They make money on the 'spread,' or, the difference between the...