Things that are super time sensitive should never have distractions present. The Uber app trying to get me to buy cold upside down delivery food while I'm trying to get a ride is a terrible UX. Another example is Waze, the once most amazing map app ever made until bought by Google, has Jack n the Box ads (ok yeah I'm eating jack n the box right now, who cares!) overlaying my fkking map while I'm driving.