Yes, most of links are non-organic, they are bought, but all this industry is buying. Biggest websites has backlink near to us.
No, we dont have any hidden links, external only 5 links to network websites. 299 internal links. keyword density is only 0.9%. there is no over optimization
one more comment.
tools still show we have 71% of backlinks with the "domain anchor" which fits our domain name, 95% do-follow, and to index page.
but subdomains are new and they have small amount of backlinks (same type), so they were kicked because of index?