Here’s an interesting sidebar.
Churches, while by default non-profits, are also, as are non-profits, subject to “unrelated business income tax” if the engage in certain activities.
Selling adverting is one of those activities. If the church collected more than $1000 in UBI then the church must prepare and file a form 990-T and pay tax on any net income that might result from the activity.
The 990-T is a public document, and must be provided by the entity to the public.