Edit: In retrospect, now that I reviewed the screenshot I posted, I see that they really did chance the house edge mid game when I was playing! I know this personally since I was trying to get their highest chances which was set at 97.05 when I started rolling! Oh come on, that's cheating right there. Without warning they changed it.
I understand completely how you feel there. I've been there too. But what they do is technically not cheating.
They said that they use variable house edge, and they have right to manipulate HE within the range they chose.
It is stupid, I know and questionable practice. But that is their rule. That is why it is better to find other Dice service with clear and more user friendly rules.