He is offering prayers for the repose for that person’s soul.
As I explained in my post, there is no soul to be praying for. The dead do not wander around, free to communicate with us, so the only spirits that fit the bill are demonic. No amount of praying will avail them.
Also, he admits in the article to directly communicating TO them, which is totally forbidden. He does it in the context of a Catholic mass as well, so I would think Catholics would be more upset with him for defiling what they consider a sacrament.