21-year-old spent $300 to start his sticker side hustle—now it brings in up to $38,000 a day: I was 'unprepared' to go viral
October 30, 2023 at 10:02 AM EDT
Jayson Siu's side hustle Invalid.jp, selling customized car stickers and rearview mirrors, has brought in over $1 million in revenue in less than two years.
