Beyond the animated glitter GIFs, and homemade HTML hacks, there were Marketing Profile Pages. They were the highly stylized designs that broke out of the consumer boundaries.
This was my first time in my career where I interacted with large clients, ranging from top movie studios, musicians, consumer and automotive brands. We had about a dozen designers in-house, working with clients directly on implementing their advertising campaigns. It was primarily one designer per page, partnered with an account manager. We designed in Photoshop, then created the HTML & CSS front-end code.