They mention 2 coins as standard claim, but there is no information about the value of the given coins. Where is it stated that 100 coins is equal to $1? Same thing for Luckydice.
The value of the 100 coins is stated in the bonus page of those casinos. You can find this information above the faucet amount details of the bonus page.
You can also see the value of the faucet coins by keeping your mouse pointer on the faucet claim or bonus amount of that page
It's off topic here, but I want to inform you that Bk8 has added Bitcoin withdrawal option again. I can't check the details of their min withdrawal limit for Bitcoin as I'm not receiving the OTP code. Try to collect the details and update it in your "Withdrawal Fees and Withdrawal Amounts" topic.