The C-level really doesn't have time for any marketing. I have relatives and friends on C level and all of them are really busy running business and tired of overwhelming marketing - they want facts, short, nice and clean.

I have done C level presentations (sometimes promoting a product, sometimes a solution) a long time and found out that if all you have to say is a sales talk, forget it!

Now, get to golf course or sailing or whatever on that level and don't push but ask what they need - almost always gives results, assuming you know what you are talking, which is not often the case with sales people, unfortunately.