Note: Starting in March 2017 you can now pay with a credit card via Stripe. This will not interact in any way with PayPal and allows you to purchase subscriptions on a credit card.
WordPress Store Locator Plus add ons can be purchased with a credit card. To do so go through the normal checkout procedure. When the PayPal login screen appears choose the “Pay with Debit or Credit Card” button on the bottom of the screen. Fill out your details for the credit card information.
This will allow you to make the purchase and have it billed directly to your credit card WITHOUT going through a PayPal account.
Subscription purchases at My Store Locator Plus currently require a PayPal account to be associated with the subscription. This is due to the way in which PayPal and the payment processing system manages recurring payments. We are working on integrating Stripe with the MySLP subscription system so you can pay with credit card without a PayPal account.
Premier Subscriptions at WPSLP can be made via PayPal or by using a credit card with Stripe.