NFT utility providers are allowed to display Curio Card artwork on their site/app if that tool supports Curio Cards. Examples of this include market stats tools, marketplaces, documentation and information, galleries, and games. You may also use card artwork when advertising that Curio Cards is a supported NFT. This permission is for display purposes only and does Not apply to the creation of derivative works (see below). Curio Cards can revoke this default permission for a project (for example, if the project is violating community rules).
You need to check the licensing of derivative use policy of each artist whose work you plan on using. Some of the artists have stated upfront terms while others require individual discussion. There is no singular licensing agreement that covers the whole collection, each artist retains the rights to their work.
Unless other terms are reached: As of 2022, licensing is based upon https://creativecommons.org/licenses/ For holders of the Curio Card: CC BY (commercial use) For non-holders of the Curio Card: CC BY-NC (non-commercial use)