If that is true than 30K's of D3 miners will bump the global hashrate of Dash from todays 35K to around 500K. About 14X difficulty increase and thus more than 14 times less profit than today? Bringing the daily profit down from $130 to $7. That is what I got in case of 30K total delivery.
I think you can't calculate like this.
We have many crypto to mine with X11 algo, not only dash.