Is it possible to Pay With a Like for prolonging Pro Sites account?

Hi there,

I've just came across your Pay With A Like plugin. My question is just like in the title. Is it possible to Pay With a Like for prolonging Pro Sites account? E.g 2 weeks extra for users who tell their friends on FB about their site in my Multisite network.

If not, than I believe it would be a great addition for future releases. What's your optinion?

Best regards,
Chris