PayPal is an eBay owned company. The advantage of using PayPal, as a customer, is that the merchant never gets to see any of your financial information.
When you checkout on a merchant's site directly, the merchant will receive your billing address, credit card number, expiry date, CVV/CVV2 codes, personal phone number, and other private information. This means regardless of how secure the site is, somebody will eventually get their hands on your personal and financial data.
However, When you checkout via PayPal, we only see the shipping address you specified in PayPal and optionally a telephone that you explicitly wish to share with us.
Any other questions please feel free to contact us on http://help.tinydeal.com/contact-us. And we would answer you within 24 hours.
Have a nice day!