Yeah, I made this so people could find that one odd song out there - every once in a while. Not really every song in their library. You can make your own account at acrcloud.com and get 100 free ID's every day, just for yourself. Check out the preferences page.

I'mma contact acrcloud (when I have time) and see if there's something they can do here, but I really suggest you make your own accounts if you have a big backlog of things to ID. Or use shazam like you suggested yourself.

There's actually no way of "buying" this addon, it's just the message the server gives off. I'll change that sometime.

Sorry for the misguided hopes, and thanks for letting me know this happened.