If you wanted to use it for commercial purposes, we ask that you get in touch with us first. For more information including getting your API key, click over to api.comicvine.com. For community support, you can go to the API developers board.
If all of this doesn't make sense to you, there's no need to worry about it. Continuing doing what you were doing.
If you want to build an application with Comicvine data ( comic issues, characters, teams, etc ) just sign up for an API key. It's the same API that is on Gianbomb.com and Animevice.com -- but specific to comics.
Please don't post in this thread if it's not about the API. Please also don't post questions asking what an API is. This thread is for software engineers.