Either his parents control the trust, or his grandparents set up the trust with professional tard-wranglers who only disburse money for specified things. That would explain the idiotic purchases once Nick started making the big superchat bucks, like the car that he landed in the ditch, and his sudden "fuck you mom and dad" attitude. With a trust of this size with a bunch of beneficiaries, it's fairly common to cover stuff like a primary residence, college tuition, and a $25-100k a year "allowance" depending on the financial health of the trust. If that's the case, he had all his basic needs covered, but the sudden superchat windfall made him act like a wigger who won the lottery.