Can't really see what your evidence is? I play slots a fair bit and have had a good number of 50% return sessions. This sort of stuff is pretty normal. You can go 75% over long wagering too. This is what slots do. They are games of high variance.
Sorry you lost and for the boring answer. I have had a bunch of sessions like this but also some very unlikely wins. Hopefully you will get some soon.
I know it is fairly common to get these sessions but they are only normal within the system you are playing.
If I gave you a Casino with the exact same slots and stripped away all the bullshit that controls the RTP and variance you would notice a very big difference in how they played.
If played both versions for a long time and you made graphs from your play data and compared them what you would find is that the overall RTP is similar but the peaks and troughs (win/losing streaks) were much less amplified on the slots without the weighting.
It is hard to make a clear distinction between weighted slots and rigged slots, probably why the Casinos and software companies keep quiet on the subject.
As has been pointed out 3 reel slots use weighting but there are no cries of rigged. I am not sure why that is but probably because 3 reel slots are less complicated and people understand how the weighting is used to alter the probability of different stop positions being selected (such as the bonus symbol on reel 3).
One thing that should show you though is that the RNG is secondary to the weighting. Or to put it another way you can have a perfectly fair RNG but a rigged slot.
I am not making that distinction much clearer am I?
That is because wherever slots are weighted the scope for cheating/rigging is increased but not necessarily a fact.
To make that point clear ask yourself how often the bonus reel should appear on the 3rd reel of that 3 reel slot.
Don't know? (There is no way to find out)
Then you don't know if it is rigged do you.
When we extend this to 5 reel slots with scatters that trigger not only bonus rounds but free spins you can imagine the weighting gets far more complicated.
Bonus rounds will offer a prize of between (min) X and (max)Y amount.
How is that prize determined?
More importantly we are led to believe that wins are generated in real time in free spin rounds. Not a chance - they operate in much the same manner as bonus rounds. Is that a fair game?
As for 9 lines and variance with Scrooge I will put that in perspective to make it even clearer.
If I was playing one line and that variance was "normal" I would be hitting 3 of a kind or better once in around every 300 spins.
That means, for example, that if the slot had an even 20 symbols on each reel (the slot will have more than this and different reel strip lengths)and 1 wild and 1 scatter on each reel my probability of hitting 3 of a kind or better (with wilds) would be;
Where s=any symbol and W=wild and X = specific symbol
Where reels 1 to 5 are separated by commas and winning combinations are in brackets
W,W,S,S,S = (1X1X19*X20X20) = 7600
S,W,W,S,S = (19*X1X1X20X20) =7600
W,S,W,S,S = (1X19*X1X20X20) =7600
W,S,X,S,S = (1X18X1X19X19) = 6156
S,W,X,S,S = (18X1X1X19X19) =6156
X,W,X.S,S = (1X1X1X20X20) =400
W,X,X.S,S = (1X1X1X20X20) =400
X,X,W.S,S = (1X1X1X20X20) = 400
*19 because scatter blocks the winline, 18 because wild already calculated
Then we need all the natural wins where we match 3 or more of any 3 symbols.
X,X,X,S,S = (?X?X?X20X20)=?
This depends on the reel layout and how many of each symbol exist on each reel (the nitty gritty of natural variance) Scrooge has 13 symbols including Wild and scatters with lowest win paying a very lowly 60 coins (this suggests
this slot has low natural variance not high by the way)
We are only making a rough example here though and I will actually be very kind and calculate for only 1 of each symbol (20 different symbols) which will make the total win combinations greatly less than would normally be the case.
so;
X,X,X,S,S = (1X1X1X20X20) =400X18 (all symbols except wild & scatter) =7200
Just to point out how much higher this figure would be in reality, if a symbol had 3 instances on reel 1 and 2 instances on reel 2 and 2 instances on reel 3 and n amount on the last 2 reels the winning combinations for that symbol alone would be 4800!
So our slot on a full cycles has 3.2 million combinations (20X20X20X20X20)
Winning combinations of 3 of a kind or more=43,512
3,200,000/43,512 = 73.54 which would be our expected hit frequency playing 1 line and 8.17 playing 9 lines.
The vast majority of slots have a higher hit frequency than this to improve playability and this is achieved by micro payouts for most 3 of a kind combos (less than bet)
To achieve 34 blank spins from 35 playing 9 lines is a massive anomaly, especially when you consider the timing of the streak.
So many people who talk about slot variance and how it is achieved (natural or weighted) are really without a clue what they are talking about.(That is not aimed at you Geezer)
The point of all that is to show how natural variance works and should be incorporated into the slot through reel layout, award amounts, likelihood of feature triggers and expected feature value.
With the current software we have a mock version of this with the variance being manipulated behind the scenes via algorithms that dynamically weight the probability of feature wins and even outcome of each spin.
For me Scrooge is a rigged slot because it oversteps the boundary of just weighting feature probability to weighting probability of wins.
That is what compelled me to post again above and beyond my normal campaigning to get rid of weighting, to point out this very cynical approach by MGS to software design.
I once again wish all the forum and Mods a very merry Christmas and a Happy new year. See you in the Spring.