But, what are those?

I dug up a whole network of rank & rent sites in a certain country spanning half the country today (we're talking about 50-60 sites for relatively large urban areas).

Most of the stuff looked like stardard (and well done) rank & rent, but then something popped out at me.

Here's a few links that I found among some of the sites (keep in mind, I only analyzed 5-10) and these links just kept coming up like a wildfire (I mean there were easily dozens more that I didn't bother copying down).

http://appliancerepairnewberumaha.blogspot.com/2017/04/vancouver-appliance-repair.html
http://washerrepairbanuren.blogspot.com/2017/06/vancouver-washer-repair.html
http://washingmachinerepairmodoshiyu.blogspot.com/2017/06/vancouver-washing-machine-repair.html
http://electronicsrepairneriai.blogspot.com/2017/01/electronics-repair-vancouver.html
http://fridgerepairssuikigu.blogspot.com/2017/07/north-vancouver-fridge-repair.html

Can someone tell me what these are an how they function? (Beyond a web2.0, I'm well damn aware, thanks).

Standard link farm with surrounding trusty links. It's part of bigger SEO strategy - propably no cost PBN or SBN.