Even with a squeaky clean, long history and full disclosure that account will be limited, guaranteed. At LEAST for a period of time while you jump through hoops and send in your statements only to be held to the mercy of some dingbat Paypal account rep that couldn't give a rat's ass about you. And during this time (and it will take time for them to decide your fate) you're stuck scrambling for another payment processor, losing orders, and at the whims of Paypal to recoup the funds for the orders they did allow you to take in.
Attrition will happen in any recurring billing model. After a while, you'll learn what the lifetime value of each customer is but I wouldn't PLAN for the average to be any more than the initial payment plus one month. That's just the way it goes no matter how good your product may be.
And don't go to Google Checkout thinking it's any better. In fact, it's worse...MUCH worse. Whereas Paypal will limit your account and hold your funds for 180 days before releasing it to you, at least there's a good chance you'll actually receive that money; albeit probably 6 months in the future. Google Checkout, on the other hand, will simply deny you access to your account (including transaction records and customer contact information) and refund everything, even if there isn't ONE SINGLE CHARGEBACK, REFUND REQUEST, or COMPLAINT of ANY KIND.
Ask me how I know. :angryfire: