Apart from the Tri Joint Force agreement, Qiu Yue also negotiated for a few additional trading agreements to make use of King Sol's previously promised 'blank cheque'.
There was no written agreement on what exactly would be given to Jin if he successfully repelled the Orcs. Tasked by the System, she designed the contracts to be vastly in Jin's favour. He, however, did intervene as Jin saw the deals would be so absurdly favoured towards them and asked her not to go too far. If they squeezed King Sol completely dry, then it would merely ruin their beneficial relationship.
Only with Jin's feedback did Qiu Yue admit that she might have gone a bit overboard. If it were just one particular deal in their favour, it would not be too much of a problem, but she nearly made a mistake to present them all to their benefit. She felt somewhat awful and decided not to take that much advantage of the poor Goblin King.