Alexa users who are Amazon Prime members are reportedly being automatically upgraded to Alexa Plus. Users who have been upgraded can revert to the old Alexa by saying, “Alexa, exit Alexa Plus.” One user claims that they were “flooded with ads” after downgrading back to Alexa.
My "smart"TV is not online at all but I still see ads that seem targeted for the most part. OTA is a dying platform I think, though