It is simple capitalism. A demand is identified, and supply is created to meet that demand. If a DSA version of Carbon had been posted through MassDrop, I'm sure it would have sold very nicely, but that didn't happen. The fact that some Chinese company came along and filled the void was probably inevitable. That's not really the problem, in my view. The problem is that they didn't include the designer of the set (t0mb3ry in this case) in any of it. He should have been consulted, collaborated with, and allowed to participate (financially) from the sale. It is the fact that none of that happened that bothers me. There isn't even any simple acknowledgement of the original designer anywhere.
It should be evident by now to everyone here that t0mb3ry's creativity is being shamefully appropriated by an emerging market force that has demonstrated zero interest in honoring IP provenance. Anyone who knows the situation and buys that set anyway is no friend of this community.