I can disagree on your statement. After coming back to game, on new server I have started to do decisive from 25-30k. There was days when it took all 50 daily attempts to claim all chests, but since then there wasn't a single day when I didn't done it. It's free stuffs after all, and like with everything in game, it needs patience.

Yes, but you get Strange stones. Especially in new server and for every new player, Strange stones = 2 free cloths from Strange stones shop. Also extra fragments from chests towards unlocking new ninjas or upgrading to 4*. And it's all free.