Quote Originally Posted by Saeleyna View Post
It's definitely RNG, but you simply get more chests if you contribute more to a fight. Usually if I join a fight that's ending I get maybe 4 chests total whereas if I did a lot I'll get 8-12, which means more likely to get more souls. Also as someone mentioned if you're the one that starts it pretty sure you always get one.
Yes, you get more chests, but only get more PLATINUM chests. And those contain tickets and only tickets (okay fine, also raid SSRs at like 0.00001% chance or something).