Why are newly mined bitcoin charged ~10% for withdrawal

[metalbean]

This is what is happening in BTCC and the minimum is 10 BTC. Is this common practice in other exchange too?

[beerlover]

Always 'collectibles' cost more. If you bother about tainted bitcoins, then you need to pay more for newly mined/uncirculated bitcoins.

Is this common practice in other exchange too?

I have not come across with any other exchanges have the options like "uncirculated bitcoins".

[LFC_Bitcoin]

Probably because they're clean, will almost certainly not have been stolen or scammed at some point. Also there is more discretion in owning them than older coins.

[Velkro]

This is what is happening in BTCC and the minimum is 10 BTC. Is this common practice in other exchange too?

Use other services then like slushpool or cheaper exchanges.
Free market is free.

[Hazir]

Probably because they're clean, will almost certainly not have been stolen or scammed at some point. Also there is more discretion in owning them than older coins.

You are right. That is the reason behind the higher price. But it that also doesn't mean we agree on something like 10% higher price just because coins are fresh.
How many bitcoiners actually care about tainted coins? In the end every single coin might be tainted, whether we like it or not.

[metalbean]

Always 'collectibles' cost more. If you bother about tainted bitcoins, then you need to pay more for newly mined/uncirculated bitcoins.

Is this common practice in other exchange too?

I have not come across with any other exchanges have the options like "uncirculated bitcoins".

Interesting, I've never buy on other exchanges but BTCC so I am surprised that they are the only that provivdes freshly minted coins