Basically any other "custodial" online wallet will do that but there's actually no "Mixing" involved in there,
Blockchain.com doesn't do this commingling. Would it if I upgrade to the interest-paying version?
Blockchain()com is a non-custodial online wallet; you should search for "
custodial wallets" instead.
Interest-paying version requires KYC, you also need to send the funds to your main wallet if you want to send them out so you won't be able to "
mix" your coins for obvious reasons.
I can't recommend you any custodial service since most of them have the same policy as Coinbase so you'll like get the same results when you use them for gambling.
Consider using a desktop client like Electrum and use the common privacy measures like never re-use addresses,
you can also send the funds to a couple of different unused addresses before depositing it to Coinbase; or just use a real mixing service.
I wouldn't need to use it for gambling directly. I could use it to rebalance funds between wallets that I use for gambling, without paying 2% for a mixer.