Originally Posted by Spudman

are the 80% links the same anchor text, e.g 80% have anchor "hot babes" and the 20% are something else like "teen porn".
if you have 80% of your links the exact same anchor then that could be your problem. backlink profiles need to look natural, as if people have linked to your site without asking you. having nearly every inbound link exactly the same is very unnatural.
to rule this out, get some generic anchor text like, "more here" and shit like that to the diversify your backlink profile, might help rule out that.