Both systems definitely have different pricing for individuals vs
organizations.
Please see the mail abuse prevention system website for info on the DUL,
RBL and RSS. They waive the fees for individuals and "hobby sites".
http://mail-abuse.org/feestructure.html
The spamcop setup is a donation-
The doco states:
# unscored by default -- commercial services. If you pay for these,
# give them a score so they will be checked.
#
# 0.5 to 1.0 is probably good for the DUL scores
# 1.5 to 2.0 is probably good for the rest
score RCVD_IN_BL_SPAMCOP_NET0
score RCVD_IN_DUL
