Tokyo Rose had a job to do; I assume she was paid well.
Tokyo Rose;
Did she believe her own propaganda? No, probably not. Yes its sounds like she needed to eat and was stuck in Japan during WWII.
There were several women who worked as Tokyo Rose. This is the one that most people associate with her.
https://en.wikipedia.org/wiki/Tokyo_Rose
“Although she broadcast under the name “Orphan Ann,” Iva Toguri has been known as “Tokyo Rose” since her return to the United States in 1945. An American citizen and the daughter of Japanese immigrants, Toguri traveled to Japan to tend to a sick aunt just prior to the attack on Pearl Harbor.[15] Unable to leave the country when war broke out with the United States, unable to stay with her aunt’s family as an American citizen, and unable to receive any aid from her parents who were placed in internment camps in Arizona, Toguri eventually took a job as a part-time typist at Radio Tokyo (NHK).[3] She was quickly recruited as a broadcaster for the 75-minute propagandist program The Zero Hour, which consisted of skits, news reports, and popular American music.[2]”
....Snip...
“According to studies conducted in 1968, of the 94 men who were interviewed and who recalled listening to The Zero Hour while serving in the Pacific, 89% recognized it as propaganda, and less than 10% felt “demoralized” by it.[2] 84% of the men listened because the program had “good entertainment,” and one GI remarked, “[l]ots of us thought she was on our side all along.”[2]
The take away? Pretty low success rate. They filtered out the propaganda and enjoyed her show!