Matt Hindenburg is a user who joined in 2018. He makes various shirts that are good quality and are really cheap.
Example: 1 buck or 10 bits for each shirt.
Matt Hindenburg is one of many people who has a space in his username, (maybe they will remove this feature.)
He is also friends with many admins and popular people, Including Executive, spacebuilder, Isaiah, and more importantly, blueham.