This is a transaction carried from the human plane to the Divine. The act of the devotee remains in his plane and he too remains there. The only use for this kind of offering is it will help him realise later the meaninglessness of it. Money is a representation of the triple forces of Time, energy and materials. By offering money, one offers to the Divine his bondage to time, energy and materials.
Money is a force of the lower vital and by offering it one moves to the higher vital.
Offering, as any other activity, has its movements, both horizontal and vertical. While in the first movement, offering brings a copious supply of money. Money offered to the Divine brings a lot of money to the devotee. When this phase is over the vertical movement starts and he is released from the dependence on money for his existence. If money still comes, it comes for the work of the Divine.