I used to do it out of obedience and expectation of blessings.
Later, I realized I expected some minimum reciprocity from the church experience such as access to certain non-financial services the church provides, and civility in relationships from members and leaders. When I realized I expected that from God’s church, and found it sorely lacking at different, critical times, I lost my tithing mojo.
I do fund other causes – but they are causes I feel passionate about. Some of them I have created and it’s good to know that 100% of what I pay goes to the cause.
I find it easier to give to causes that make no claim to divine commission. Divine commissions fall off their pedestals pretty hard. For temporal organizations, I have low expectations.