OK, so you hire an ad agency, which then needs its own IT department, it’s own HR and finance.. why not merge them in? If you ban mergers you’ll just have the people individually get poached
That doesn't really make things efficient because the different nature of the two industries will require some of the departments to stay different. Not to mention it removes a business that was previously providing marketing services from the market, and attaches it to a jet engine company.
I doubt that Giphy the Meta subsidiary uses the same IT department as Facebook.
