That's $9.99 x 3 (3 months of Stadia Pro) + $69 (Controller) + $69 (Chromecast Ultra) = $167.97. Just with that, it's a 30% discount, roughly.
I'm not counting the cost of Destiny 2.
And it appears as though it will be compatible with other controllers. (Probably not the Chromecast version, though.)