Thank you for your interest in Social store!
Social Store costs only $3.99 per month, there are no additional fees. No long term commitment is necessary and you can cancel at any time.
Your PayPal account won't be linked with your eBay store, it's only used to create your monthly subscription payment. Also, the eBay authorization page in the sign up process is a page in eBay, so we don't have access to your eBay login info.
Let me know if you have any other questions.