I can only speak for myself, as most of you know i posted my DoA stats here
Dead or Alive stats.
The main reason that i am in profit on this game is the crazy session i had at Betsson in October
https://www.casinomeister.com/forums/threads/winner-screenshots.4193/
Now the way i play DoA is different from how i play other slots. With other games i play for entertainment, and i usually focus entirely on the game. DoA is extremely boring outside the features, and even those are usually nothing to write home about. So with DoA i just have it running in the background while doing other stuff, like watching movies, browsing the CM forums etc.
So it's purely about getting the big win, so i fully understand that most people can't be bothered to play DoA, if i was to watch this game like i do with other slots i would be bored to tears.
So it's important as with all gambling to only deposit what you can afford to lose, i consider everything i deposit to be lost until proven otherwise.
So what i do is i usually start with a balance of 300-400x my bet size. I do take bonuses when they are available, i won't take anything below 50%, the max WR that i will accept is 40xB.
Then i just put it on auto spin with a stop trigger for free spins.
I do think the way Rolastan seems to be doing it is smarter then what i have been doing, he only seems to play one bet size, while i have been increasing my bets after a big win. And sure if you win again then great. But that means I'm using smaller wins to fuel larger bets, and when I've lost i have often decreased my bets. So i expect that he avoids the most extreme ups and downs.
And i think he mentioned that he had accounts at almost every NetEnt casino, and was playing mainly on bonuses, while i only play at a handful of casinos. So most of my deposits are without a bonus.
In the end though it is as with any other slot, play long enough and you will lose.