How do they got these Backlinks?

Hehe. I'm sure Mazda would sell backlinks to gambling websites. Seems legit... :D

While they're on a subdomain, I'm 100% sure these websites have been hacked.
 
Simply wow links but all links are done by unethical means. It is better to buy Sape links than doing this
 
I agree with the above.

Looks like webmaster do not know. Not surprising since these sites must be under attack constantly.

Track them and check them in a month, see if they are still live.
 
I have seen links like these on so called press release websites. After digging deeper it seems that they have managed to somehow fake the main domain. I don't know if they fool google with this. I couldnt understand how this was done.

Maybe some proficient hacker could understand this better.
 
I'm not sure this matter can be discussed here, if it can't, please some moderator alert me.
It's called DNS Hijack.
 
Just goes to show that subdomain with zero links on high authority main domain can rank, despite what google says.
 
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