Banner GIFs smashed by WP SMush

I am using WP Smush on our car blog. However trying to upload animated gifs for banners, to earn a little money, the Smush smashes the gif file - and the animation no longer runs... Is there a option not to smush GIFs as it is only the banner ads i upload as GIFs????
Or any other solution? I had to turn WP Smush off in order to get the banner to run right.