Midrub is a tool for web marketing which allows to anyone to publish posts on 20 social networks, share RSS posts to 20 social networks, publish posts to any website created with Wordpress, create Amazon/eBay RSS Feeds, reply to comments(on Facebook, Twitter and other social networks), create email campaigns and send to your email lists and other useful features comming soon. Users can register and pay with PayPal(recurring payments), Stripe or 2Checkout to upgrade their plan. You just have to create the plans and limit the platform features for each plan.