I don't build links that consistently. Usually I would build 1 PBN link every 1-2 weeks. I've noticed that my rankings have decreased from page 2-3 to now in page 6-8 range. I'm guessing this is because I haven't built a link in 1 week+. Does this mean that the strength of my links de values as time goes on? Let's say I built 2 links right now, will those links bring me back to my previous page 2-3 rankings or would they boost me over that point? It seems kind of silly to have to build new links to get back to where I was before.