Currently, I'm managing email data for a few partners on a 50/50 revshare. After talking with a friend, I found that the call center that he works for is in need of more call volume. I have access to a sizable amount of email data in the call center's vertical, and proposed sending email messages with a unique inbound number of theirs to this data. We would then track the number of calls generated from this, and I would be paid per call. Now the problem is, I'm unsure how much these calls are worth to them. Is Pay Per Call the best method of payment? Maybe a revshare would be more appropriate for this kind of deal? Does anyone else have experience doing something similar? I would love to talk through some ideas.