There are no fees other than what paypal charges for each transaction
which is currently 2.8 percent plus $0.30 per transaction which is
very reasonable. Most other sites dont use paypal and charge upwards
of 7 and more. Hostmyreunion.com helps you account for paypal's online
transaction charges and will let you know what you will need to charge
to break even. eg: A 50 dollar online transaction (50 * .028) + .30 =
1.70. So you would need to charge 51.70 to receive 50 dollars after
fees are accounted for.
The quota for 100 sites has not been reached yet, at 55 now. So your
site will be ad free for life. :-)