I have toned down the original title, as both it and the top of your post punch down on other Workflow developers who also worked hard on their converters. The Alfred forums aim to foster a respectful community where we try to support each other and have everyone’s Workflows be better.
The “best” workflows are subjective. The power of Alfred lies in everyone being able to decide on their own tradeoffs. By requiring users get an API key, your Workflow is already disqualified for plenty of people.
While it’s fine to ask for donations, that in conjunction with the rest of the post and title made it look like spam. We don’t know you yet and can’t even trust you’ll stick around and fix bugs in your work (almost no one makes a living on open-source donations, and none of those are making Workflows). Please get to know the community (and let us know you) before making definite claims.
It uses the ibpaste Keyword to paste the result. But you can add a Hotkey: right click on an empty space → Triggers → Hotkey, then connect it to the Run Script.