You give them the swipe, they send it to their list but....what if 300 subscribers click your link (not 100)?
I know that some guys over deliver (forget about that). The question is: how could they stop other subscribers from keep on clicking your links (sending far more clicks than those that you've purchased).
The only scenario that comes to my mind is this one:
1. The solo seller sends HIS own swipe. A generic one that may work ok with multiple campaigns.
Learn how to make money online.
--> Click to download free report
2. The link points to a link rotator (which jumps to another campaign after your link received X number of clicks).
Supposing that it works this way...the quality of the solo goes down as you
don't have the chance to use the solo to really pre-sell what you want to.
Maybe i'm wrong and someone can clarify.