There's a cap on these ID things, as the service isn't really even free. If you're a hardcore user, I recommend making your own account at acrcloud.com. You get 100 id's for free every day on the 'free plan', which starts after the trial plan ends.

Check the preferences page.

Thanks for letting me know this happened. I'll see if there's something I can do.

edit: thanks for updating, and thanks for the extra feedback. I'll make sure to include information about the free plan/trial somewhere as well, based on this.