Re: Compensation
As others have mentioned, getting your lawyer involved should be first and foremost. If there's a fire on a job that you've sealed and they determine it's electrical, it's your seal and not the HVAC company's that's on the permit (and on the hook). Lawyers generally use the "shot gun" approach to filing law suits. They'll file against anyone involved with the project hoping to get charges to stick.
With respect to compensation, see if you can do some research through the NJDCA-Board of Electrical Examiners of Electrical Contractors and find out if there are any other companies or electricians that are structured this way. You might be able to contact one of these licensed electricians and find out how he's compensated and hopefully give you a guideline (but be careful; just because he's doing this doesn't make it right).
Finally, I would suggest, as part of your agreement (in writing), that you be involved in or inspect each job that requires your license. At least that way you'll have some control over what is being done under YOUR license.
Just my opinion. Good luck.