Forum Moderators: skibum
1. Harvested: the opt-in part is a lie.
2. The email equivalent of FFA link farms.
Typically you have to subscribe to be able to send offers to a "safe" list. Since everyone is only interested in just sending their offer to everyone else (not receiving them), subscribers use throw-away email addresses. So, yes your offer may get sent to lots of email addresses, but it will probably not be read!
"Safe" lists are not really worth the effort.
Also remember that it's your link/domain that will be in the emails, so it's YOU that will end up getting the bulk of any spam complaints/added to blacklists, etc.