The pulse is probably a better cooler than the hellhound. I'd either keep it or return it and get the red devil for $880.
https://www.amazon.com/dp/B0BMWGMX5B?psc=1&m=ATVPDKIKX0DER
The deal is not advertised on the one you linked. If they are participating the deal is listed under the price of the card like the one here.
RXの場合為替レートに直すと165円とふっかけてきているがCPUはどうだ?
Reddevil RX7900XTX
Amazon.com
Amazon.co.jp(CFD)