We are actively working on adding this feature to our 2.0 product.
While we do not have a Paypal integration for WP E-Sign. We do integrate with EDD, WooCommerce, GravityForms, Ninja Forms, WP Forms, Formidable, and Caldera Forms which ALL have paypal integrations. So you could very easily still integrate paypal into your workflow using WP E-Signature and one of the many thrid-party integrations :-)Rodger Sargent commented
That would be WONDERFUL!