There have been some weird changes in the vault not long ago and I can't figure anything out...At first the yearly interest was lowered from 5 to 1 percent, then it was increasing every time I collected my interest and now it's stuck on 3%, I still get the 'Your yearly interest was increased by 1%' (or something...) message but nothing changes. Is there a way to increase it and is it suppose to be this way?

Once you hit the 3%, you're capped, the Morty Cards won't work. actually recently wrote up a guide on the changes made and how they effect things. c: