Earlier quoted context omitted.
No, it's not a conflict of interest. It's perhaps dumb, or morally bad, or several other things.
> dumb, or morally bad This is easy to say in hindsight. There was a non-zero chance the decision could have went the other way. Also, companies aren't stupid. They don't buy insurance against things that are impossible. And the supreme court doesn't hear cases that are 100% obviously illegal.
Companies don't want to deal with the headache for many things. It's not a given over what time horizon and how much work is involved to get the refund. It's totally sensible to sell the claim for 70 cents on the dollar for example.
The supreme court absolutely hears cases that are obvious. They do it for several reasons - to create clarity, to narrow scope, to set a very clear precedent, and other reasons.