So in my other replies, I also concluded as you have, that Steemit, in its current form can only support a handful of clients (that's why I'm not even bothering with smaller clients right now). However, I don't want to see straight up banner ads from Samsung etc. I want companies to promote real engaging posts that they already are creating through their existing campaigns.
For example, Google Cloud might promote a video series on d.tube to team serverless development with Firebase's new hosting feature etc. Microsoft doing a tour of their office and promoting some recruitment content etc. I think ultimately ads should as close to real content as possible. We are just so used to shitty ads that we instantly have negative thoughts about anything related to ads / marketing.