That is the thing that makes blackjack.fun the best blackjack website in the world, they have seen the problem, they have contacted back and they will try to rework and fix the issue. You know what other places do? There are two types, one of them just ignores it for the longest time and maaaaybe fix it one day, or even wait until there is a new V2 and fix it there, the other people just get the feedback, tell you nothing, work on it and fix it and let you know when they fix it, meanwhile you have no idea from the feedback to fix if they are working on it or not so you just wonder if it is a place to actually go play.
Blackjack.fun is not like that, they are always here and they always talk about what they are doing, like the multiplayer and so forth, you know EXACTLY what they are working on.
Believe me, there are a lot of services that actively read and analyze feedbacks and try hard to work in it and in this case I mean gambling industry, both, casinos and suppliers (i.e. slot providers, live casino suppliers and so on).
But mostly what makes blackjack.fun highly prominent is that they read every advice that's given here and boom, second day you wake up and what you posted in this thread is already changed/implemented on website.
DarkDaysWithdrawals are instant as far as I remember, withdrew for 2 times and got my bitcoins quickly.
Oh, there isn't any built-in exchange on their website, hope it will be implemented soon.