Rifts
I understand you need new players to get strong to replace retiring accounts.  So I get it, when my baby account pulls a 6*, 6*AG and a T5c from the sidequest.  In addition to Candy.  
But it’s a slap in the face for my main account to get gold each of my 3 rare runs.  Especially when I already have 200 million.  
In the future, when we can’t choose a rift.  Letting us block one would be fantastic.