Aside the mass spam you can easily check on ahrefs he 301'ed 2 domains and 302'ed another 3 domains, for a total of 5 domains redirecting to his site. Seem like he pointed those in the time span of 2 weeks. 1 each 3-4 days avg.
His plan wrote down in few lines:
Bought aged domain with decent link/social portfolio.
301 and 302'ed some sites to pass link juice (over a time span of 2 weeks) while spamming shitload of contextual link to those.
Then while his link building software were spamming 301ed domains, he spammed the shit out of hell to his money site with more contextual do follow backlinks and G+s
Now you can rank a site aswell in a super competitive niche!
You only need to learn (if you dont already) how to purchase the right domains to 301/302.