Ohhh this is interesting!😁🙈 Well, eventually, I think this is good, right?
I understand what you're saying with curating and taking back and this being a reason for not neccesarily feeling the need of saying back "you're wlecome". That is actually a good twist. I dodnt think this way.

Also I think there could be a lot of "thank you" to reply from your part everyday, which is sometimes time consuming. And very often, time is short and it must be used on quality.

Other than this, I dont know what you can reply to all "thank you" you get here. I guess it depends on the people who write it, your relation with that user, your time, mood and other factors. And yet, there's not so much to say to a "thank you for curating me", so I guess a smiley face (already means a you're welcome kind of answer) its appropiate.