I've been looking for answers ever since. But I didn't get the answer I wanted 
For example, if I use Rankerx,
The number of domains in Rankerx is limited.
When I create a backlink to the money site with Rankerx,
Only the backlinks that exist in rankerx will be repeated over and over again.
In this case, can I think of Rankerx as disposable?
As an example above, I think pbn is the same.
Thank you in advance for your comments.
For example, if I use Rankerx,
The number of domains in Rankerx is limited.
When I create a backlink to the money site with Rankerx,
Only the backlinks that exist in rankerx will be repeated over and over again.
In this case, can I think of Rankerx as disposable?
As an example above, I think pbn is the same.
Thank you in advance for your comments.