When you buy backlinks there is no guarantee of how long they will be alive. There could be a number of reasons why they are dead, the seller no longer wants to maintain his network, or may maybe the network was deindexed from google and there is no reason to keep it alive. It happens all the time.
So why you would buy expensive links then?
You buy them to improve ranking (I think you know that) but there is always some risk that goes with it.
I understand you, but was more asking like why I should buy expensive links if there is a chance they will disappear someday soon.
The whole idea is you buy links earn money with index position.
you don't just buy backlinks for fun you got to have a plan to earn.
all website services should pay for there self or there no point being a marketer
Of course, even high authority sites remove backlinks after few years. So, track the backlinks you've built with sellers so you can contact them.
Their site strength will get reduced, so they delete backlinks from old posts or converting them to nofollow in some cases.What is the reason they do that?
To get rank your main kw an ROI so fast, then you can buy another link again. That's common when you buy some link. So that's why you should build your own network.I understand you, but was more asking like why I should buy expensive links if there is a chance they will disappear someday soon.