I've been meaning to research about slots return rates but didn't know where to start, so where did you got this data from? And is there any way to know what settings different casinos are using? I want to make a spreadsheet for my own amusement comparing slots rtp in different casinos.
Here is the source info:
Online Casinos are using Reduced RTP Online Slot Versions . Though, just a few things in the list have changed in the meanwhile.