[Plugin: The WP Booster CDN Client] Megumi points?

Hi,
before to sign up with this service I’d like to know your pricing politics, current and future.
Half hidden, in your site there is a note “When your Megumi points is 0, the service will stop”, so what are “megumi points”? how much they cost and how to use?
Thanks in advance for answer

http://ww.wp.xz.cn/extend/plugins/wpbooster-cdn-client/