I saw a post about this from 2013 here but the "correct" answer is not correct. In the sample provided the printout indeed does not display attribution, but that's only because the layout is set to "MAP_ONLY". If you use any other layout , it appears that attribution does indeed show up. This is a problem if I want to have any other information displayed on my printout but do NOT want the service layer credits showing up (which I don't, as my app is using services from other organizations and I don't want users looking at the printout and thinking they should be contacting those other organizations about my app).
Is anyone aware of a workaround?