is this Parasite SEO?

hello guys, i have something to ask, nowdays i see all domain ranked for indonesian gambling site kw like "server thailand" all rank domain use sub page not the home page to rank. is this parasite site or what it call?



any tips for how they pick the domain to do it? or anyone have experience for SEO like this?
thanks before and sorry for my bad english

I'd say they look more like hacked pages than parasites. Hacking isn't something you'll be able to get help with via BHW.