Nah you get it you just clearly don't like it
I'm saying
I have never nor do I intend to ever own a single article of Slow Bucks clothing in my life, but your criticisms don't really seem fair.
The same shirt in different colors? I've seen the logo on everything from t-shirts to raglans to crew neck sweaters, with the logo stylized with everything from glitter to cheetah print. They're not just making the same T-shirt in white, black, gray, and red. Whether it's corny or not is entirely subjective, but it seems no more corny than Pyrex, those t-shirts with an image of THE DECK OF A YACHT ON IT, or Supreme box tees.
I can't speak on any of that movement business, but they definitely aren't only being worn by weed carriers. Mainly because they seem to have really good connections in the music industry. I've seen artists from The Weeknd to Rick Ross to Meek Mill in it, so they've gotten their name out there to say the least.
At the end of the day, it's a business so if they're getting money, I can't knock the hustle.