I somewhat see a case study by Spanish and look similar as OP's question, in that case study, this group the people build thousands of web2.0 food blog and link like this:
A-B B-C C-D D-E E-F (F never link back to E)
So basically, there is no way to get a "relation" guess between them, and the result is god damn cool, with nearly dominated the web.20 platform of Spanish, in food niche.
Well, it is an old case study, and I use Google translated to read it, though its interesting, but consider this is 2017 and the ROI, I wont do that for sure!
Because its only ask for trouble for yourself, and this way gives you no apparent benificials if you got a limited PBN/web2.0 numbers.