I started using paypal when it was xcom, then paypal, it was totally free. Their income was on the cash they held. Then evil-bay bought it. I use it alot. Its the best way to pay online. The merchant gets their cash, but no cc numbers. The only fraud I have had are crooked merchants. Mostly hackers don't hack, they con. I agree with longtom, don't link a bank account. Use a regular cc. A paypal credit card can be funded by a paypal balance. An online merchant may do this for easy access. Otherwise its a regular cc.
P.A.