I don't understand why anyone is upset with vetting a business and what it does with its money, whether it is self-consciously non-profit, or just a corner store. The Circle K I visit regularly does not make charity work part of its core business values, so I perhaps stupidly assume that they are giving to organizations I support like the United Way. Maybe they are also giving to Neo-Confederates. If I find out they're pushin' the Stars and Bars, I would stop shopping there, as I have done with several other companies because their values conflict with mine. I'm not going to waste my time trying to change their minds, but I am going to let as many people know as possible so that they can wisely steward their money elsewhere.
I usually don't ask about what charities a business supports because the ones I frequent usually don't market that information. But because RustBelt very clearly DOES promote itself as a business that will support other agencies in town as part of its business plan, it seems quite normal to me to ask - OK, what are they?
I agree with Toledoen that the press about Rustbelt has been too coy about what those groups are. I have supported Cherry Street Mission directly in the past, as well as the Salvation Army and other groups. I learned that the Salvation Army refuses to hire LGBT people, though it will serve them, and so I stopped supporting them. Cherry Street Mission is also supported by a variety of religious organizations, and if it were the case that they turned away gay people, for example, I would also not support them again. If Rustbelt is sending money to anti-abortion clinics in the region, I won't give them my business, and I'll let other people in my network know of that connection. But I won't write to Rustbelt and ask them to stop; they can do as they please, as can I.
For now, i support a local nonprofit in Wood County that delivers free food to anyone in need with no added Jesus.