⭐ Merited by dkbit98 (1)
However, eXch absolutely serves for mixing when you exchange some coin to XMR, which is a privacy coin that is proven to be untraceable.
Small problem is that you aka eXch don't always have XMR available in reserves for exchanging with other coins 
Some people reported this back to me several times and I confirmed it, but I think even Binance exchange had liquidity issues with that specific coin.
There is not much we can do about it because even when we have 5000 XMR it gets sold within an hour or two. There are some people that are monitoring our XMR balance with scripts via API to receive notifications when it's up then come and buy it all. However this problem (which is not really a problem) will get some workarounds eventually.
Also, it's possible to backorder XMR on eXch. What some of our users do while no XMR reserves are available is creating and funding an order so it gets executed in a first place when XMR reserves reappear with sufficient balance to cover their order. Usually backorders get executed in less than 24 hours, because we get constant movement in the XMR wallet. Backorders are also a reason for our XMR balance to be reported as zero, because when backorders are present and there are some XMR they will appear unavailable due to amount reservation in our system.