But they were not US singles.
Most people are only exposed to singles if they're played on the radio in their country or performed.
The US people wouldn't be like "Oh..I Care is getting played on Italian Contemporary Radio! Lemme purchase it!".
US singles are really the only ones worth discussing when it comes to this.
Some of Rihanna's singles on GGGB and Loud were only released in the UK but they still count because they were released as singles. America isn't the only country in the world like omg