Your videos are very good but miss some important points. In every video in which you are describing a theme you should reveal if the theme is responsive or not. Astra is one of the few themes that does not describe what happens if the license expires. Either the web sites continue to function or Astra dies. I could not find your terms and conditions that might have answered this last question. Your knowledge base does not have an answer.
The reason I don't say whether a theme is responsive or not is that this is 2018. Any theme released in the last 3 – 4 years is going to be responsive.
When you go to purchase a product that says 1 year of support and updated means that if you don't renew you simply loose support and updates.
Responsive is the capability of a theme to “transform” as the screen gets smaller so it can fit in.
As for the Astra you have not understood the concept. Like most of the themes and plugins that have a free version (Elementor, OceanWP, GeneratePress etc) the theme is free and you can use it for as long as you wish. It will get updated forever as long as the company that supports it continue to release updates. The pro plugin gives you access to more features and capabilities. If you pay for a yearly license then you get the updates of that plugin (that gives you the extra features for a year) and then you do not get the updates of that plugin so you will not get extra features that the company may add with a feature version. The main free theme continues to work and get the updates normally.
But i hope the additional features that we get for having purchased a pro version of a theme or plugin remain intact?? its just that you lose access to support, updates & the premium templates once your 1-year license ends. Correct me if i am wrong. Its sad that none of them openly reveal that you also lose access to premium templates too once your license ends.