Sure, Dustin doesn't have the the trademarks for svbtle registered (yet), but completely ripping off someone else's work or defending the action is neither honorable nor moral.

You can't go around putting the Coke label on different fizzy beverages.

Svbtle is obviously popular for its brand. You are stealing its brand and using it for unintended purposes. The only value in what you've created is that it looks like Dustin's work.

Ripping that off wholesale diminishes the value of something Dustin work(ed/s) very hard to create and curate. Thousands of decisions went into that design. The design is a mark of quality.

Show some respect.