~I only stopped gambling there because I lost a bunch of dice games in a row and rage quit.~
Jackpot is also really difficult to win. I mean, the jackpot number is fixed and you have a 1/10000 chance of hitting it.
As they have higher house edge we need to accept the longer red streak. I have also moved from the site for this reason two years ago. Though still I visit there occasionally but not for playing the high-low game. Sports betting is the great addition at the site.
User can never hit some numbers by applying different odds because of the 5% house edge. And I think hitting the jackpot isn't much difficult if you compare it with other casino.
I am sure they will add more stuff in the future, we have to remember betting is one of the latest things freebitcoin has put forward, which means they may not be able to add everything all at once. They are probably making sure that this works first, after realizing that this is already doing fine they will probably add more stuff on top of it.
Moreover, we have to remind ourselves that they are doing a lot of stuff manually at betting as well, plus it is parimutual betting which means if there is no that many interest towards something they may not get what they are looking for, let's assume they added something and there was no interest to it, that would mean they will not be able to actually make it work since it all depends on people betting against each other to make it work.