1000 of backlinks. Is that healthy?


I am always investigating my competition and sometimes get frustrated: some competitors have let’s say 7000 backlinks. Some of those backlinks come just from one website: let’s say 5000 backlinks from one website. Is that healthy?
It is impossible to get 7000 links for a normal business from 7000 domains, so is that worth pushing these numbers up just from one website? Isn’t that considered spam? It is strange as my main competitor in snus business has exactly few thousands backlinks and sits in the top positions.
As well, some agencies work like this: get thousands of links for businesses, but I am just worried that it can do more harm than help.
Any help would be great :slight_smile: