This month, the Office Developer program has launched an update to their subscription program. The blog post has all of the details, but the biggest benefit is an auto-renew subscription! If you use the tenant to develop against O365, the subscription will renew.
In addition, you can set preferences for the products, technologies and platforms that interest you and the dashboard will highlight those choices.
Sign up today at https://developer.microsoft.com/en-us/office/dev-program