Back in the good old days non-payment of gambling debt was a threat to your knee-caps. Today, you might get cut off from Klarna and have to extend your next auto loan to 256 months.
I'm guessing that at some point, probably not very long from now, credit cards are going to cut down on this. They don't want to be held responsible for a bunch of debt from gamblers, when they've already paid the sites.
At some point, the fees won't be worth the combination of PR and actually losing money from bankruptcies / delinquencies.
If you do not have assets or high income, you can just ignore debt and it will drop off you credit report after 7 years. They can try to sue you (unlikely for <$5k debts) and then try to garnish wages (max 25% of aftertax income) but many states outright prohibit garnishment for consumer debts (like Texas) or limit it (like CA - just show that you have high living expenses to avoid garnishment).
Overall much better options that kneecaps.
If you look at the finances of a good swath of Americans, they're already demolished. Heck, the average new car loan is now 6 years with a $700+/month payment.
Gambling has become such an embedded part of the current cultural zeitgeist because people feel they have nothing to lose.
So it's not like people need to go to shady lenders in the first place, they can be pipelined from normal credit card debt into less scrupulous debt collectors.
The link you have is about business debt - that's likely much more collectable than CC debt.
Attacks have costs, no matter how marginal, and if someone is paying that, they are probably funding it with the victim payouts.
Very rarely will attacks be funded on hopes, and if that happens, it's not for long until they run out of funds and energy.