There is only one way to find out.
To make it happen.I'd say yes, it's worthwhile to do it. Not because of KamiHime community, but for yourself. ALWAYS do projects like these for yourself, not for praise or fame or whatever. Do it for yourself, to learn something new.
That said, personally, I'd only run the script if I had the source code (and understood what it does). I mean, while Kamihime doesn't handle my credit card info, the script would be running in my browser that does. Others tend to be more trusting.Ahk? Auto hot key?