......, I think that as of March, Google is tracking exactly when a site comes online (first time found) and counts new BLs within a given period (maybe per month).
The problem is that these junk sites usually exhibit good on-page
SEO and heavy linking. Thus, many new legitimate sites doing the same get caught in the filter, like dolphin in shark net ........
This is the "going through a maze backwards is easier".....If you want the content they are looking for these sites show google the sites they display. What could be more optimized than google results itself.
And if google is truly tracking the BL rate of development, then this would be plugging a damn with you finger. This would be the intensive work of trying to put a bandaid on a flawed system and creating even more work for themselves than "scraping the concept" would be. I cant imagine they would utilize a policy of tracking all new sites instead of creating a better system of judgement that does not require this.
Thats just my piece though.