The chance of not getting number 10000 having rolled 10000 times is (1-1/10000)^10000 ~ 37%.
It would be interesting to learn from someone who has a lot of referrals all together having rolled more than 10000 times whether someone of them has ever rolled number 10000 (it may be noticed on referral page of the account).
last month we stilll can saw statistic about biggest winner from single free rolls
i check again and nothing we can see now
last time i check, best winner still from roll 9994 - 9997
even no one get 9998-9999 until now
Yes your points are correct , even i have seen this stats many times