an AO3 question

When you post a work and filled in the "inspired by" field, does the author of that get an automatic alert of some kind? (as default setting, I mean, I suppose you could turn off all notifications) Or do you need to check the "gift for" field? I'm asking because so far I haven't heard anything from the author of the Pinky & Brain story I illustrated, not even a kudo or anything, which is slightly discouraging. But then I didn't actively comment on their story with a link to the picture, I just assumed they'd get a notification of "ratcreature posted X inspired by yours" and then see my illustration, but didn't mark the extra gift ticky box. Along similar lines, I guess the author needs to approve related works somehow before they get linked from theirs to prevent trolling or such? Because I notice that my illustration is not just automatically linked from the bottom of the story. Of course they could simply be offline over the year-end period.