Quoting Bagas Sanjaya <bagasdotme@gmail.com>:
Such ads is displayed only when users have Internet connection, and there is no way to patch ZZZ in order to remove ads (or we have to buy "pro" version which doesn't contain ads and adds more features).
So it's not free software anyway and does not belong to Debian main. It might be suitable for non-free, but I wonder whether it's worth the trouble to package it.