Maybe you missed the fun: They are second (or third, didn't investigate) because a1ex (cr2hdr) and you (lr plug-in) implemented a complete workflow with "RAW (from LR) -> App -> DNG (into LR)" prior to DxO Optics Pro 9.5. Yes, DxO Optics Pro is a lot more powerful but their statement is just wrong. So ... lawsuit, anyone?
Just kidding ...
Ciao
Walter