Sorry for the late response. Somehow I never received notifications for a few threads. I’m finding them now here and catching up on all missed questions.
Currently the only ad platform we support is AdSense for AMP. We plan to add support for additional ad platforms very soon along with the ability to insert your own action bars and call-to-actions.
Right now we’re focusing on helping users resolve AMP errors so that pages can be properly indexed. Once this phase is stable, we’ll move onto building additional integrations for various analytics and ad platforms, along with a lot of branding and customization options as well.