HBO Max may get a cheaper, ad-supported tier in 2021 The service will be free for AT&T customers with HBO subscriptions.

HBO Max is scheduled to arrive in the spring, and some more details have emerged ahead of a formal announcement about pricing and other information on Tuesday. There may be a cheaper, ad-supported version of the service on the way in 2021, according to a Reuters report, with live programming earmarked to start after that. If you’re an AT&T customer…