No. All payments of Nelio Content Premium are made through FastSpring, a US platform specializing in secure Internet sales. FastSpring complies with the Standards Data Security (DSS) of the Card Industry (PCI) developed to promote and improve data security of cardholder and to facilitate the adoption of security measures consistent worldwide. In addition, to protect against possible attacks, FastSpring does not keep the numbers of credit cards in their servers either.
You’ll find more details in Nelio Legal Information.