But then Mojang sent the money without a contract. The writer thought he was working under some conditions, the company thought he was doing it under other cond

But then Mojang sent the money without a contract. The writer thought he was working under some conditions, the company thought he was doing it under other conditions and they never actually agreed to anything. Sending the money without a contract is just as sloppy as sending the work and I really don’t see how the author would be responsible here. Not having a contract does not mean that Mojang’s terms are in force.