Yes! If the Seller has opted to sell their services, you will have a choice to Buy through either Avontage Bucks or a Credit Card.
If you want to accept credit card payments, you will need to set up your bank account info. Just go to your Settings and click "Payments" to set it up.
Don't worry! We use Stripe's secure and encrypted system. You can see more about their security processes at stripe.com. Avontage doesn't store any banking or credit card information on our servers.