Non-denominational means you will happily take money from anyone.
I never heard of ANY mainline christian denomination refusing money from anyone?
So not sure what your point is?
Non-denominational churches run the gamut being outright fraud charlatans to some of the most active, fearless proclaimers of the gospel...
One of the reason they are non-denominational is they aren't under the thumb of some liberal hierarchy of men dictating what they can or cannot preach from the pulpit...
I’m not going to cast a blanket condemnation on all self-described “non-denominational” churches, but I have noticed a disturbing trend of previously branded churches shucking their names in the interest of offending fewer worldly visitors and attracting a larger customer base. Many Baptist churches are doing this, included the one across the street from me. During my one visit there, I saw why. It was run like a beatnik coffee house.