You wouldn't wear a Facebook shirt. You wouldn't wear a Reddit shirt. you wouldn't wear a 4Chan shirt. Why would you wear a Hubski shirt? I don't mean to be rude, but unless you directly work as part of the Hubski team, i can't see why you would wear this.
Yeah I can understand that. I don't tend to wear t-shirts that have branding in a written form, but I do like interesting shapes and pictures. People like to express who they are through what they wear. If we didn't place value on association, we would all be walking around in unbranded H&M/Gap/Primark/[insert other sweatshop company here] clothes.
Well, I think it makes people feel part of something they care about. Tons of people wear band or sports team shirts. Wearing a Hubski shirt probably has the same feel (and I'll bet people did wear Reddit t-shirts before Reddit was the Reddit we all know and love today). Anyway, we're glad that people keep requesting them, but certainly won't feel bad if some people think it's a dumb idea.