The transferred data is encrypted yes. There is still the possibility, that your credit card information can be used by the site owner. If the site itself has horrible security standards or its systems have vulnerabilities, your credit card information can be used by interns or hackers that enter the site's backend or database. Anyway, if the site is trustworthy, there shouldn't be a problem with using your credit card. On the other hand, if the website isn't trustworthy, then never give your banking or credit card credentials. If possible use crypto, paypal or gift cards.
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