I've also never gotten anything good, and it probably is a bit rigged for money purposes, but theres nothing we can really do about it.

I cant complain about bad rewards bcs i few times get 2x summon scrolls, seal scrolls, fragments etc. but sometimes when I was 60 lvl I had 3 tires out of 5 rewards and got 3 * rewards ^^

At the early stage of game I thought its controlled somehow but now idk.

Got seal scroll just 1 time after 70lvl up. Just cuz i got 4 tries for 5 cards. After this i have 4 tries for 6 cards - still dont get anything good.