A LEAD in Lead Prosper is any lead that makes it into the platform regardless of the status (ACCEPTED, DUPLICATE, FAIL).

An INBOUND PING in Lead Prosper is when your lead supplier sends a ping to your Ping Post Exchange campaign. Any other pings used in real-time actions are FREE

A Pre-Ping (Dupe Check) in Lead Prosper is when your lead supplier uses the Pre-Ping (Dupe Check) API to see if the lead already exists in your campaign's database. This is typically used in co-reg lead suppliers.

You will only be charged when your lead supplier uses the Pre-Ping (Dupe Check) API. The internal dupe checker for your campaigns is FREE.