I have always heard/thought that co-tenant rights kick in and that once the well pays out 100%, the unleased entities become co-tenants and they own the same percentage they own in the tract (not a unit well) and they have the right to receive their share of working interest (not royalty interest) in the well. The other working interest owner(s) get diluted and the co-tenants get revenue on a monthly basis only after that, but they need to pay invoiced costs after the payout. I doubt you can insist that you would make an OG lease with the operator at this point, but the operator may have the option to take an OGL or not.