Hi Lutpin, I must say again I'm a little disappointed  with the fact that the fee system for withdrawals is not, to me totally transparent. This might not matter to the majority of gamblers, but for smaller investors like me, it makes a difference, and is an issue.

You said earlier that the transaction fee slider is in the units BTC / Kb. (i.e. based on the size of the transaction).

I just withdrew 0.5747133 BTC. I selected the transaction fee slider to 0.00156000 BTC, expecting that the total balance (i.e. 0.5747133) will be sent, MINUS a transaction fee per kb, OF 0.00156BTC/kb. (so for example if transaction size is 300 bytes, I'd have expected to be sent 0.5747133 - 0.00156/1024*300 = 0.574256269.

Now what's actually happened was TWO things:
https://blockchain.info/tx/f92697229a778f6d7884cd9cd4dbc63ca0f84ea59322a33ae781125b9d36b010

1) Only 0.57315332 BTC was sent, therefore 0.00156 (approx $11.70 USD) was taken a SEPARATE FEE to Crypto-games.
2) A transaction fee per kb of 0.00156BTC / KB was used to send the transaction in 1) to the blockchain.

Therefore the ACTUAL fee assumed a transaction size of 1KB (and applied that fee to me, on that basis), even though the ACTUAL transaction size was only 224 Bytes, therefore I paid a significantly larger fee than I thought I would.

I know you might attack me and say I'm wrong. I like the site, and the ability to invest, I just don't know why the fee system isn't clearer and also cheaper. From the link, I expected to pay 0.00034944 BTC (Which was the actual transaction charge for putting it on the blockchain, not 0.00156).

Additionally, I have other investments in other coins but have no idea how fees work for them. For example, the slider can't all be based on fee per kb because ETH has a different system (uses gas). Are you able to make it clearer to everyone on how fees work?