>>4545350Well I think
>>4545053 is right. He's a space cowboy who, admittedly, strongarmed vespa's father into paying off his debt. When that debt was settled he chose to turn down the payment because he had actually bonded with the princess and would feel bad scumbagging her family. Presumably 1Mil Space $ isn't much out the pockets of royalty, but there's a principle behind it.
He's got a bit of honour, even if it's selective. It's admirable. Remember, he asked the king not to tell that he didn't take the money. There were strictly speaking, no romantic motivations in his decision not to take the money. It was purely an act of honour.