I would go the other way, companies offer low bug bounties because they don't want researchers to discover them in the first place. This looks terrible for Arc despite the fact if left undisclosed it probably would have continued to be unexploited for years to come.
That's why brokerages like Zerodium exist - you can sell it to them, and they'll sell it onto state actors.
Probably you're just used to a relatively good life, not a bad thing :)
Image being able to sell this off for $20,000 (although I think you could ask for more, seems to be a really bad vulnerability) in a marketplace, for >90% of the world that's a pretty good amount of money that you could survive a long time on or add a lot of additional quality to your life.
Am I wrong in thinking that with this vuln you could drain any financial accounts that they log into Arc with? Or, if they use Arc at work, that you now have a way to exfiltrate whatever data you want?
A browser vuln is about as bad as an OS vuln considering how much we use browsers for.