Money has nothing to do with atheism, which is simply a rational lack of belief in a God or gods. Atheism has no need of money to preach its cause, because atheism does not send missionaries out into the world. Atheists, almost by definition, are not televangelists and are therefore not tempted by the opportunities of televangelism.
Some atheists may donate money to worthy causes, not because they are atheists but simply because they are good people. No doubt, some atheists may be corrupt, just as some people of faith are corrupt, but in neither case can this be put down to their belief or lack of belief.