You can run a paid webinar using PayPal.
Step 1: You must have a business account.
To verify if you have a business account click on the gears in the upper right. If it says "upgrade to a business account" you have a personal account.
Click on the upgrade button to set up your business account.
Step 2: Click menu option Pay and Get Paid
Step 3: Sub-menu -> Accept Payments - > PayPal Buttons
Step 4: Click on "Buy Now"
Step 5: Complete all product info such as price and description.
Step 6: THE BIG STEP - Paste the EasyWebinar registration page into the completion box.
Step 7: Upon completing the product setup it will give you a link to promote your payment portal.
Send this link in email, social media, blog articles, etc.