Thanks for your valuable advice. He hired us as consultant with old version of our product a few years ago to help in building a platform for a financial firm

Thanks for your valuable advice. He hired us as consultant with old version of our product a few years ago to help in building a platform for a financial firm where he joined as CSO. He conceptualized and brought initial customers for the platform but he ended up having litigation with the company because the company owner refused to give him some percentage of the sale of company promised verbally, and fired him out of the company. He thinks we can also do the same to him if he takes us to some good size and his efforts would be wasted. yes, it seems that he has incompatible vision based on big plans for his LLC he has divulged unintentionally over the discussions in last few days. We've rejected in writing multiple times and gave our offer based on originally discussed plan. But he keeps on insisting that we can't sell to federal government/fortune1000 without US ownership, and we'll end up selling 10 copies vs. thousands of copies he can sell. Vesting is something we've decided to offer as an option in addition to reseller/distributer option already made.