I'm surprised no one has mentioned this before, but if the btc fees are high for your bankroll, there are other options, for example:
LTC - $0.06 fee
TRX - $0.06 fee
XRP - < 1 cent fee
And they are all faster to confirm and have lower minimums to withdraw.
On top of this, there's the option to exchange their bitcoins <-> altcoins within the site as someone created a third-party exchange service which is pretty convenient.
I don't know why OP is complaining about 3 dollars.This isn't the end of the world.People were scammed on crypto casinos and cryptocurrency exchange platforms,losing thousands of dollars worth of crypto.
Maybe it's because he's a small player and for them, every dollar adds up whenever you withdraw. I also don't play with a huge bankroll but for me it doesn't hurt to spend a few dollars just to withdraw my money knowing there are casinos that charges higher fees than stake.