Why do you want people to contribute additional data specifically back to you…
One possibility is so that database can be created on the backs of the users, then the database owner can slam the door and turn it proprietary, like the CDDB did.
Their stated goals don't lean that way, but I don't see a clause that either permits or forbids the database owner this action. Lawyers will be required to figure that out. I suspect there is an implicit ability for the grantor to terminate the license, but that is what lawyers are for.
(I did notice that the termination effects reference clauses that don't exist.)
One possibility is so that database can be created on the backs of the users, then the database owner can slam the door and turn it proprietary, like the CDDB did.
Their stated goals don't lean that way, but I don't see a clause that either permits or forbids the database owner this action. Lawyers will be required to figure that out. I suspect there is an implicit ability for the grantor to terminate the license, but that is what lawyers are for.
(I did notice that the termination effects reference clauses that don't exist.)