Is it safe to provide my credit card information?

Yes.  

All credit card, purchase data and account information is processed using secure encryption—the same level of encryption used by leading banks—and no credit card information is ever stored on ProStudioMasters.com servers. 

Credit card processing for ProStudioMasters is managed by Braintree, a Level 1 PCI DSS Compliant Service Provider. Braintree is the payment processor behind some of the biggest names on the internet, and their security practices and infrastructure details are available here.