I haven't had any gold spider coins drop either.
I think it's kinda fun that you get rando event drops from the past beast master monsters, especially if it's a monster from an event before I started playing. I did notice Kelpie tokens but I thought it dropped both. I'll be on the look out for what it drops.
Because of my goof from the limited time pet for the new main quest, I just banked energy. I've never done that before so starting the event out with 500 energy is such a weird experience!