Re: Was this
True, payment processing can be a problem, but no more of a problem than it is for manual payment. Ideally it would be done with a yearly subscription for all your certificates in a lump sum, or paid in monthly installments, rather than dribbling out a small payment each time a certificate is renewed. The accounting department would HATE YOU if you managed 3000 certificates and each was a separate charge for yearly renewal!
Automated renewal also makes it practical to have certificates that last only a month, making the cumbersome process of revoking them if compromised less of a factor.