What's the story with using logos for integration (SendGrid, AWS etc.) without actually supporting them? Is it not possible to get into legal issues there as i

What's the story with using logos for integration (SendGrid, AWS etc.) without actually supporting them? Is it not possible to get into legal issues there as it's quite an effective boost to the site to make it _look_ like you're associated with very reputable sites? Or.. just something to worry about when people come knocking? :)