Adda52 is rigged as hell. The RNG is a nightmare. Based on my sample size of 250k hands, I found out that I wasn't winning more than 15%(all in preflop) as a big favorite.
There are two types of hands where winning is impossible for me on this site a) dominated hands AKo vs AQo(74.4% equity)
AKo vs KQs(70.4% equity) or any dominated hands. When I was dominated by villain, I lost more than 90%.
b) Big pairs against 1 over card KK vs A8o(71.67 equity)
QQ vs K8s(68.58% equity) or any similar hands.
Most of my winning% comes from higher pairs AA vs KK or QQ(81.55%) The only fair case is pair vs pair.
I don't see any randomness in their RNG, it's a pattern where it's never going to end. If you check variance calculator from primedope, the variance I had been facing is impossible.
As a 15bb winrate(2nl) on other site based on few million hands sample, to go through downswing for 200k, I was very suspicious of adda52 because I played very tight and almost 90% of my all ins, I am a big favorite. My hands wasn't holding up enough.
It looks like their business model where they profile certain players based on winnings and withdrawals and then rigged their game. I am pretty sure they don't rigged everybody's game.
Postflop is similar but I won't comment because my sample size might not be adequate. The trend is the same. eg. My set on the flop lost against gutshot a few times and set vs a backdoor straight not holding up. A made hands against a flush draw on the turn, losing too much, people hitting their outs 2 outs to 9 outs too frequently. Overall, I had been running so much below ev, it's impossible.
This type of downswing is possible on 3bb/4bb winrate player. But for a double digit winrate, it's impossible. I would see whether things even out when I put more volumes. Maybe I might be going through one in a billion type of downswing.
My final assessment of adda52 is that, this site is very suspicious. Take caution while you play there and better safe than sorry, withdraw your money and keep just enough money for you play the game.