On what operations will the spread fee reduction apply?

Nomad will apply your reduced operational fee every time you add funds to your Nomad account through the app, that being a spending or an investment account. The same is valid when transferring funds to Brazil.
For transfers from Brazil to the United States, the reduced operational fee will be applied during the quote currency when you reach a greater level on Nomad Pass, considering your current balance of valid points and the quoted price.