Up to 4% of turnover. So if they make more than that it is still profitable to keep going.
Not that it is likely that they make that much in profit, but still. There probably shouldn’t be a limit, and there probably should be personal legal consequences such as jail time for repeat offenders.
You can apply a fine multiple times in a year if they don’t stop. As that 4% is based on global revenue you’re eventually going to make it unprofitable.