i think your need to drip feed the links .
dont think it wise to just add 10 pbn at anythink might cause a footprint with google algo.
slowly is better when dealing with pbn .
every 2 weeks add a pbn link , that the time they usally index on avarage .
yes i think 2 weeks every link about right , espacally with the stats that get added to the google algo , 10 heigh stat websites all at once will flag the main website.
blody good quistion being honest .
it been a long time since i read anyone adding more then 1 pbn , i am sure you need to drip feed them , but the days to post each link is the tricky ansaw.
anyone?
i was going via indexing stiticsicks