A LOT of companies make random accessories like that, or as you put it "Stupid shit"
Albes & Terrible One both make pins/buttons, Kink makes a phone case, Animal, Odyssey, Tree, Shadow, and I'm sure more, all make wallets, are all these guys whack as well?
By your logic, you're also calling some of the most legit companies in bmx "whack" as well.
Even so, what does it matter if they make those things? Better they make them so the money goes back into the company to allow them to pay their riders, make parts, and make more "stupid shit" to annoy you with.
As for their "overpriced rail" and all the ads the make.. First off, you don't have to follow them on whatever social media you keep seeing them on. If what they post annoys you, either ignore it or unfollow them. I don't like Wiz Khalifa, would I follow him and then complain about how many Wiz Khalifa things I see in my newsfeed? No.
Second, the rail really isn't THAT overpriced when you think about what it is. A solid, portable rail that you can take apart and will hold up to the abuse of bmx. If you think you can make a better rail for cheaper while still maintaining the sturdiness, mobility, ease of use, strength, and still be able to be taken apart like that, then I'd love to see that.