to increase the paid subscriptions would be useful to include more functions ..
For example, it lacks an image editor in which a user can manipulate the images, with features such as: black and white, blur, crop, add frame and much more ...
here two plugins for example
http://js-tutorial.com/camanjs-182
http://js-tutorial.com/aviary-javascript-sdk-183
ADMIN decide whether to use features such as free or paid. I hope will be implemented