$5,000 is actually pretty normal for a critical. I think the most I received for one bug was around $10,000, but this is the exception.
AI has also ruined the market. I'm a security consultant (where I make most of my money) and stopped bug bounty once AI slop reports made it impossible to actually get anything triaged in a timely manner.
Something else many don't know is that with all of the major platforms, customers can see the bugs before they are even triaged by the platform team. Many companies are now taking advantage of the long triage times and fixing the bugs before the researcher can get paid. It's then marked as a duplicate and the researcher gets nothing.
Isn’t that just a speedrun-encouragement for selling the exploit not to the one offering the product, but an attacker offering more (in this case, >$0 is not difficult to exceed) instead?