(Future) competitor update -
It’s good to see another challenger(ish) provider in the US. Their app’s transaction feed helps me appreciate the design of Monzo’s even more too 
This line from their website made me grin -
Chime’s business was built on the principle of protecting our members and helping them get ahead. That means we don’t profit off of you. We profit with you — earning a small amount from Visa on transactions which is paid by the merchant.
Emphasis mine.