Admin can enable multiple withdrawal services from Woocommerce-> Settings->Referral Tab
For enabling PayPal services, the admin would require to avail the corresponding API key as well as the Secret Key by registering with PayPal.
For enabling Paytm services, the admin would require to avail the Paytm merchant key.
Admin does have the privilege to set-up a withdrawal conversion rate as found suitable to him.
For example:
A user named X has 200 Credit Points where the Admin has set up a conversion rate of $0.50. Following these settings, the user X will be entitled to initiate a withdrawal request for $100.00