and people doing that stuff hide behind proxy servers... it could be your neighbor for all you know.... not saying ive ever done anything like that, or i know what a proxy server is, or.... ok i liked computers a kid...
with a proxy, you basically bounce your internet activity off a server at a disclosed location. a lot of proxies dont track who uses them, as far as i know, so they are anonymous. i dont see dd serving you dos attacks... there is no profit in that.
DD is not really China per se (It's a SAR, like Macau). MF/DX/HKE/Dereelight/Solarforce-sales/O-like is also HK, so is CNQG. Now FP, Olightworld, lightmalls, int-outdoor and aliexpress stores are in China mostly.
Three days after my first purchase from lightake my PayPal email was hacked which had never happened before ever. Then I buy from the Dino and within two weeks I start getting fake emails from PayPal stating my account was limited and I had to click their link to log in and fix my account. I found all this strange because I have never had any issues like this untill I started ordering from China based websites.
I'm not saying that DD is the source of the attacks. I doesn't take a genius to know that it takes more than one person to run a large international shipping sales company.
That being said, it could very well have been an employee of DD going through customer ip logs. It could also be completely random. Just thought i'd put it out there and maybe you could take a look at your routers/firewalls in the future and just see if anything happens.