"Saṅkīrtana, you can use saṅkīrtana for any material purpose, but that is not permitted. That is Nāma-Aparādha, because Nāma, the Holy Name of Kṛṣṇa and Kṛṣṇa, are identical. You cannot use Kṛṣṇa for your personal material benefit. That is Aparādha. Kṛṣṇa is the Lord. You cannot involve the Lord for your service. Similarly, you cannot use the Holy Name of the Lord for any material purpose. That is not permitted." Srila Prabhupada Srimad Bhagavatam Conference 1.10.5 Māyāpur, 20 June 1973