Assumi Sir, your observation appears correct. After reading the following Articles of the Constitution of India, it appears to me her act of paying money is economic/ financial activity. It is due to Article 25(2)(a). As per this one can only propagate religion without use of money, else the moment money is used, its use comes under domain of regulatory laws for economic/ financial activity. So propagation of religion is not free from State control, unless you are propagating religion without using any money and also not doing any other activities that are mentioned in Article 25(2)(a). Satisfying Article 25(2)(a) completely is practically next to impossible.
25. Freedom of conscience and free profession, practice and propagation of religion.—(1) Subject to public order, morality and health and to the other provisions of this Part, all persons are equally entitled to freedom of conscience and the right freely to profess, practise and propagate religion.
(2) Nothing in this article shall affect the operation of any existing law or prevent the State from making any law—
(a) regulating or restricting any economic, financial, political or other secular activity which may be associated with religious practice;
(b) providing for social welfare and reform or the throwing open of Hindu religious institutions of a public character to all classes and sections of Hindus.
Explanation I.—The wearing and carrying of kirpans shall be deemed to be included in the profession of the Sikh religion.
Explanation II.—In sub-clause (b) of clause (2), the reference to Hindus shall be construed as including a reference to persons professing the Sikh, Jaina or Buddhist religion, and the reference to Hindu religious institutions shall be construed accordingly.
26. Freedom to manage religious affairs.—Subject to public order, morality and health, every religious denomination or any section thereof shall have the right—
(a) to establish and maintain institutions for religious and charitable purposes;
(b) to manage its own affairs in matters of religion;
(c) to own and acquire movable and immovable property; and
(d) to administer such property in accordance with law.
27. Freedom as to payment of taxes for promotion of any particular religion.—No person shall be compelled to pay any taxes, the proceeds of which are specifically appropriated in payment of expenses for the promotion or maintenance of any particular religion or religious denomination.