Only sales based on an order to Zen would be counted. The cPanel reseller account is one service, so will only be counted the once - when you've purchased it you're not ordering anything else from Zen, you're reselling a service you have paid for.
If you're selling *additional* cPanel services (e.g. Bronze/Silver/Gold/Platinum accounts) then these are additional Zen sales which would count. I expect there may be some confusion on exactly what was being asked. I would suggest contacting the Partner program directly for complete clarification.
kind regards,
Phil D.Long
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Phil Long
Technical Support Manager - Zen Internet Ltd.