So I have a browser based game and I want to start offering some Premium accounts. Which methods are better for this kind of payment? I mean a very small comission for the service provider. Thank you for all your suggestions.
Consider paypal, google check out ,authorize.net with a merchant account.. if you're in Canada maybe Alertpay, overseas maybe money bookers. Good luck and all the best to you.
Big guys will not be able to offer a contract based on individual terms. If you are looking for the smallest commission, find and contact your smaller local providers who will be more flexible in terms of rates and support options. You can try to find a list of PCI DSS-compliant gateways sorted by country and go from there.