Well I never finished either. I got stuck on collecting the keys on day 10. I had seven keys in my inventory before starting day 10, so i thought I would breeze through the last day. I sent out around 25 requests to my regular responding neighbours, after quickly receiving 11 keys I was stuck on 18 keys for the last 14 hours of the event. I guess nobody was playing CS on a weekend.
I wasn't going to use up 16 gems to skip the last two keys. Not too worried anyway about missing out on another variant of a cute animal giving out lacklustre drops.
Bad planning again by S8 using 20 requests on the last day of a storybook, especially at a weekend when a lot of players are spending time with their families rather than CS.