Maybe if once per week we could give gifts (not from Item Shop for Nemo buck only) from one of our animal variations to a friend (who is on friendlist), it could be good and limited well. I mean not for every friends once per week, i mean choose 1 friend and for him/her we can gift once per week one of our animal varaitions. So not so often and not too rare in the same time. And that way the surprise eggs will not loose their function either.