Yes. I see a way GitHub could turn the Issue feature into a more flexible service that explicitly allows this kind of use cases. However, as of now, there was n

Yes. I see a way GitHub could turn the Issue feature into a more flexible service that explicitly allows this kind of use cases. However, as of now, there was no explicit wording that encourages creative use of Issues and its API. While GitHub may keep silent now as there are not many people doing this, if in the future the "hacks" become more popular, we could see GitHub taking a stance on this. I certainly hope GitHub can gives some explicit consent to these use cases, which could lead to an entire set of new services that GitHub can offer (like what Google is doing currently).