I don't know how much of a deep-dive disability office would do on his bank account or even online presence, but would the fact he's earned the amount of money he has from grifting impact his eligibility of disability?
Probably not since people are willingly giving him money as gifts. If he were doing something in exchange for money, like creating art for people to buy, then the argument could be made that he's self-employed, and even then he'd need to be making over something like $1700/mo in order to have his TardBux taken from him.