public pbn lists are basically a please nuke me map for google's spambrain lol . once a service becomes too reputable and easy to find , it’s already carrying a heavy footprint
i've burned through $xx,xxx testing marketplace vendors for high-risk niches over the years . 90% of them fail within 12 months cuz they get greedy with outbound link countor use garbage hosting subnets that share IPs with 5000 other spam sites
if u really want to buy instead of building ur own mesh (which is always better tho)
ask if their nodes are on different hosters (digitalocean , vultr , linode mix) or just one big reseller account . if the whole network is on one ASN , one manual action kills everything u bought
grab a sample url and run a header check . if they arent blocking Ahrefs / Semrush / MJ12 at the nginx level , competitors will find ur link and report u within a week
check the other links on the homepage . if a blog links to a plumber , a crypto casino , and a k-pop site all in one sidebar the topical vector is cooked . google ignores these link hubs now
real private networks arent usually compiled in public lists tbh . the best links i’ve sourced were via 1-on-1 deals with guys in Jr. VIP who own small , niche-specific clusters ( 10-20 sites max ) . public = footprint . period .