At present, we don’t have that. However, we understand content writers, and web agencies can benefit from a membership or subscription options where they get access to all themes at a flat annual price. We have that in mind, and we are working on it.
Please subscribe to our newsletter, and we would keep you posted.
You can always get in touch with us (firstname.lastname@example.org) to discuss your requirements (bulk licensing, or unlimited usage of themes for your client projects, and so on).