I own several domain names, mainly to do with my own surname, so instead of having one email address, I can use any email@myownsurname.com(not a real domain) and it will go to my email inbox.
For dx.com, I signed up as dx.com@myownsurname.com. I noticed that I got a spam mail today to that email address from Aurabuy.com, not sure if my email address was handed over willingly or dx.com has been hacked.
What do you think?

You may have found the link to the Aurabuy spam. I received the same email today.
DX hacked, or otherwise 'associated' with Aurabuy? No idea. May become clearer in time.
I admire the care taken you've with your email. I'm silly not to have taken similar precautions.
Mattgal, I've also noticed a real ramp-up of China-site related spam recently.