The game itself is provably fair, so if you say that it is rigged then you should also provide a solid evidence. This is serious accusation to say a game is rigged while the game itself is developed by the most popular casino in this crypto gambling industry "Stake". In fact, there are many users who have hit that 10,000x since the game is upgraded with this new max multiplier. I am not sure what is your main reason to say it is rigged, is it due to tiny chance to hit the max multiplier only or just because of your own feeling? If it is due to the low chance to hit max multiplier, means that you are also willing to say all games with possible huge multipliers are all rigged?
Usually, people make these kinds of unfounded accusations against the casino when they’re tilting after a long losing streak.
As for Plinko and the x10k multiplier, I wouldn’t say it comes up all that often, but looking at the leaderboard, yes, over the past few days, there have been a few lucky players who’ve actually managed to land such a huge multiplier.