There's absolutely more than zero risk. In Denmark a medium sized taxi company was fined $200,000 for keeping their customer data longer than necessary.
Also: How are Google and Facebook offenders of GDPR?
I think this is exactly the point. Smaller companies (like stripe), that play fast and loose (maybe not stripe) with European customers’ data are a good target for regulators to make a point.
Also: How are Google and Facebook offenders of GDPR?