One thing that some Catholics may not be aware of is that in most Protestant churches, the bulletin is distributed by the ushers before the worship service, as it contains the “Order of Service.”
The Order of Service gives the order in which things will happen during the worship service; e.g., Prelude, Opening Prayer, Opening Hymn or Praise and Worship Time, Welcome and Announcements, Testimonies, Choir Anthem, Pastoral Prayer, Scripture Reading, Sermon, Hymn of Invitation, Closing Prayer. (This is just an example–it’s what I grew up with in a Baptist church.)
So the Protestant bulletin is actually a “program,” like those given out during plays and concerts.
In the Protestant churches that I attended, the printed bulletin was considered a “worship aid.” In fact, in some Protestant churches today, it is actually called “your worship aid” instead of “the bulletin.”
So you can see why the OPs wife is a bit upset with the advertising in something that she perceives as a “worship aid.” It would be like opening the Missallette and finding several pages of makeup, food, and car ads. Not exactly conducive to worship.
I personally agree with everyone on this thread–the Catholic parish bulletin is more of a newsletter than a bulletin, and in this venue, advertising is appropriate and welcome, not only because of the funding of the newsletter, but because it creates a feeling of community among the parishioners.