I can’t answer that question, but am grateful I received the benefit of the prayers in my case.
I remember a long time ago Agrarian (remember him?) wrote to me how important it was that I received the prayers and chrysmations of the Orthodox Church at baptism. And indeed — I am very happy to be Catholic — I believe my baptism deep in my infancy was the most important event in my life, and I am very grateful to my parents for bringing me to it, even despite the marginal character of their own faith.