From the Billpay signup site:
For Microsoft® Money 2004 Standard users, the MSN® Bill Pay Premium Plan
provides you with up to 3 months of free online bill pay service, which may
be combined with other MSN Bill Pay free offers for not more than 12 free
months of consecutive MSN Bill Pay service during any 12 month period. For
Money 2004 Deluxe users, the MSN Bill Pay Premium Plan special 12-month
offer provides you with up to 12 months of free online bill pay service,
which may be combined with other MSN Bill Pay free offers for not more than
12 free months of consecutive MSN Bill Pay service during any 12 month
period. For Money 2004 Premium and Money 2004 Small Business users, the MSN
Bill Pay Premium Plan special 24-month offer provides you with up to 24
months of free online bill pay service, which may be combined with other MSN
Bill Pay free offers for not more than 24 free months of consecutive MSN
Bill Pay service during any 24 month period.