One of the problems mobiles responsive sizing gives us is that we’re never sure exactly what is going to appear as the final result. Pictures have to be created so that the subject of the picture is in the centre. That limits things considerably. And there’s even more trouble when you start putting type messages in respsonsive situations.
You want the message to appear as Acme is proud to sponsor World Aid . But what you actually see in certain screens is different.
Acme is proud to ponsor id. The truncation is worse than meaningless. It makes the brain work hard to guess something that probably wasn’t very interesting in the first place. The Two Ronnies nailed the experience with this classic sketch.
Until Linkedin produces responsive banners the advice has to be don’t put type in the banner head.