I knew many link spammers circa 2008 and for a while people were excited by XRumer

https://en.wikipedia.org/wiki/XRumer

which was a lot better than other products on the market and solved difficult problems like CAPTCHAs and email verification links and was famous for a "conversational" advertising campaign which generated results like

https://www.garagejournal.com/forum/threads/give-me-link-to-...