Let's think. We don't need indexers for quality sites such as: - pages that are indexed already and just posted a new content - pages with natural backlinking - pages with sitemaps and correct internal linking; sitemap would update automatically, there would be more internal links automatically etc - many other natural, quality cases Also, most sites sent to indexers are: - 1. spammy tiers 1,2,3,4,5,6,7... - 2. they very often get deleted (link rot) by platform admins - 3. they very often get penalised by google Points 2. and 3. also have plenty of backlinks (incoming or outgoing) that are poorly made previous tier or next tier, that can carry these penalties too! Apart from that, probably all indexing services follow a pattern, since they claim they index 50k sites per day and more, there must be some backlinking pattern behind it. After all, indexers are just backlinking these sites. These spamflags, usually arent instantly penalising your site. However they are there, accumulated, and then, rank u lower than ur competitors the more spamflags u have. Important, interesting stuff: Theres different amount of spamflags a website can have to rank on first page in each niche. Sites about porn stuff, cpa affilates, game hacks and such have way more spamflags on first page of Google than websites that are pure white hat, for example bike shops, personal blogs, charity sites, etc. Linking your Tier 3 with spammy links will affect Money Site, obviously. About the spamflags - its very interesting. They dont instantly ban a website. It will just rank lower than competitors in a niche, while each niche has a different level of acceptable spamflags amount to rank, as I gave an example above. Another example: It means that, if a person learned how to do 100% natural backlinking profile on his bike niche, which is his personal interest, and not cause any spamflags, then after that person would switch to cpa affilates he would DOMINATE the SERPs and rank #1 because he simply leaves no footprint. It was required for him to be on second page on bike niche because it was very competetive stuff. However after he switched to niche filled with spam he appeared as very distinctive in positive meaning for Google. Your thoughts? I see these kind of things are not discussed too much here. Also, I am not paranoid. Indexers is probably just another footprint.