I'm fully aware of C-Cex having a lot of issues lately, and with them ALL apparently being gone for a month didn't help any..

Be cautious before you send any SMLY to them right now with the price spike.

https://chainz.cryptoid.info/smly/address.dws?BPiw7XeoXZ6ySEM2yW1t3sbV8AYwx2whaX.htm

The last 4 transactions here.. I sent 3k over, was never credited them, and now they're gone?

I created a new address and sent over another 1k..

https://chainz.cryptoid.info/smly/address.dws?B4bKKnWRWpcCd4bofW6Nc4T3SsqdSLezca.htm

Same thing. No credit, and now they're gone?

Interesting indeed!