I start all of the sponsor slot with "A Message From sponsor name". After that they provide me with ~250 or so characters of text (not too strict on this) as w

I start all of the sponsor slot with "A Message From sponsor name". After that they provide me with ~250 or so characters of text (not too strict on this) as well as text + link for a CTA button. Outside of that, there are no demands from their end. Some ask for the Click Rate after the fact and some don't. If they ask I give it to them. The main back and forth with sponsors is that when they book multiple slots they often want to test multiple versions of copy and/or CTA button.