Your leads can be declined if the network or advertiser have detected the leads to be invalid. The following leads are considered invalid:generated via a computer-generated user, such as a robot, spider, computer script or other automated, artificial, or fraudulent method designed to appear like an individual; generated by a person who has previously registered for, opted-in to, and/or is already a member/customer of an applicable advertiser, as the case may be; does not meet all criteria of an offer.