Rewards should change requirements, Cloned box is possible to get if you camp 24/7. But like box 4, 500 pumpkinhead that's impossible unless you're rich. Because they are extremely rare. Haven't gotten one yet and I got 175+ points.
Also 50 points for cloned island 48h? That's worthless reward, since nobody is going to catch anything in that time and we all know it. Sure its good so ppl can explore it. But perhaps then add a bigger reward 500 point = 1 weeks passage to cloned island, at least then someone will have a chance to catch ;p
Btw, having the spawns in cities wasn't the best idea. It's KS party constantly during the event, ppl get mad, say bad stuff, push each other ect. I suggest that spawns get moved a bit away from all cities, people keep running around all the time as well. Or add spawns in other spawns, like halloween golbat = in random golbat spawn. Spinirak = poison pokemons, like near celadon in random place there. Teddy = could be outside citys borders, haunter can be in 4 random haunter spawns. And so on.
Like the christmas event, it worked well. Can bit more random though. Doesn't have to spawn on exact same sqm like it does now.