Okay - I got it. There are two ways to pay bills.
1. you can keep the money in fiat and pay via fiat.
2. You can put your money in Bitcoin and then pay bills via Bitcoin.
I guess I just assumed if you are using Fold that the idea is to keep the money in Bitcoin, mostly. But if you are just using Fold as a US$ cash account - then the Bitcoin sell fees (through spread) would not apply.
But adding to this whole story - if you are keeping your fiat in cash on Fold, what percent do you make? On Etrade I have free bill pay and I get 3% interest.
I get it - try to support the Bitcoin ecosystem. Still working on it. I'm nearly 100% Bitcoin so about the only thing left is checking, a ROTH IRA, and the bill paying in the fiat system.
It will come eventually!