That's fake news the performance is not 12th/s it's only 260GH/S(±5%) and it isn't a miner for kaspa it is for radiant network.

Look at the details from the official site here https://www.iceriver.io/product/iceriver-rxd-rx0/

It's currently sold out and about the profitability, according to Asicminervalue and Whattomine it's around $2.5 with an ROI of 5 to 8 months depending on the current Electricity rate.

I don't think it's worth it the ROI is my estimation if the difficulty is the same but I think after they release this unit and arrives to customers expect for high difficulty increase and drop in profitability that can make your ROI takes longer to achieve.
And the coin you are going to mine has less liquidity.