i use activemerchant in my rails app (http://corduroysite.com http://corduroysite.com) that charges cards through braintree. card information is stored in brai

i use activemerchant in my rails app (http://corduroysite.com http://corduroysite.com) that charges cards through braintree. card information is stored in braintree's secure vault and monthly subscription charges are processed on my server using each customer's vault token. braintree got easier recurring billing since i implemented this, but it all works so i'm not about to change it.