Religions have long thrived because of needs ... and have been sustained in different ways by either profit or contributions.
Tithes are required contributions by some churches which help sustain the living costs of full time church leaders and emissaries.
Many roles are defined and assumed and vary in title, scope and purpose from religion to religion.
I do not claim to be a theologian - but I do claim to be simple enough to understand that religion is at times a business. Revenues can be donations and surplus donations are manifested symbolically in such ways as the Vatican for example.
Profit in it simplest form is simply the difference between what someone gets and/or takes (a tithe) and what someone is given given.
It is assumed that those who are "given" are in need although that is not always the case.
For example a corporation sells either goods and/or services and receives something perceived to be of value in return. Most often it is cash or cash equivalents. Over times transactions between two parties have gotten quite complex with various layers of middle men and various forms of assets exchanged such as securities.
Religion provides various services and goods and solicits contributions to pay for the cost. Over time religions have accumulated enormous surpluses which have been invested and multiplied. These assets do not benefit the needy until they are liquidated and can be transferred in some beneficial form that those in need can use.
Such is the case with the Mormon church and the same could be said for any "wealthy church" which for me is an oxymoron.
In the case of Mormonism "wealthy church" is an oxy-mormon!
Why? Because you have to be a moron to overlook the materialistic "for profit" goals of the Mormon Church. (google "White Horse Prophecy")
In reality since there is always more need than wealth ... and therefore there should be NO religious surplus other than reserves for emergencies.