That is nothing to do with provably fair, it is just the way the site has chosen to display the data. Dice games on many casinos display the entire number. For example, one site shows it's max payout as roll over 99.989 or roll under 0.010. Freebitco.in just rounds the numbers up for display, maybe you could say it is a little misleading but I cut them some slack on the grounds that 1) It is free to play 2) The information is there if you read it, they never lied and said it was 10,000:1 you (and many others) just assumed it.
Thanks again for the explanation. I totally agree with you on this point. It is a great site and as it is free to play, so we can’t complain much.
Wow, that confused me for a moment getting used to the European "," and "." swap. I guess it works the other way for you as well.
Lol! Yes, I realized before that you were writing the opposite way. I wrote like you in my former reply.
First part is correct as all numbers from 1 to 9,999 round up and down. I'm not sure where you are getting 1.5:10,000 for zero. It is the same chance as 10,000 as it has to round down from less than 0.5 so it's 20,000:1.
Ok. I’ve just realized where I got confused: There are 10,001 numbers in the free bitcoin game: numbers 1 to 10,000 add up 10,000 and number 0. Total 10,001.
If they were just whole numbers, each one would have 1 to 10,001 chances of appearing.
But with this system chances are 1 to 10,000 for each number apart from two. As one of them has 0.5 to 10,000 chances of appearing I thought that the other one would have 1.5 to 10,000.
But no, all have 1 to 10,000 chances apart from those two (0 and 10,000) which, added up (the two of them) have also a 1 to 10,000 chance.
sometime they do this to tempt you to wage big amount 
without advertising banners!!
