Check out the announcement here, https://blog.infura.io/infura-dashboard-update-9f02d0643eb3
Dashboard is now live with Stats, setup your requests to Infura with your Project ID and start seeing how your app is using Infura. Docs updated with information on how to send requests with your new Project ID.
Infura is transitioning API requests to use the new Dashboard generated Project IDs. See the timeline in the blog post.