This is all correct -- Notably, you can't spend 501(c)(3) dollars on (c)(4) activities. All of those employees that work for both entities have to accurately r

This is all correct -- Notably, you can't spend 501(c)(3) dollars on (c)(4) activities. All of those employees that work for both entities have to accurately record their time and expenses the (c)(3) must charge the (c)(4) for any support that they give it. It's a big pain in the ass but worth it to keep the IRS off your case.