I haven't find that much information about free members their but they offer some Membership packages.... and i guess they pay via PP or EG..

here is some information from site :

Gold Membership
When you upgrade your free membership to a Gold Membership, you will receive the following benefits:

1. Free Referrals - Your referral url will be randomly inserted 4 times for surfers visiting the web site without a referral url.
2. 1 dollar for 1000 credits (x1) weekly
3. One - 1/2 Cent Paid Email to All Members
4. 50,000 Banner Impressions (monthly)
5. 1000 1/4 ct Paid-To-Click (monthly)
6. Contest Email / one-contest email to all 1 winner will receive .10 cents good for 7 days
7. Contest Paid to Click / one contest Paid to click link to 1000 clicks winners receive .10 cents
8. Payout at $6.00

Gold member fee is $40.00 for a Yearly Membership. or $75.00 for life long membership


Silver Membership
When you upgrade your free membership to a Silver Membership, you will receive the following benefits:

1. Free Referrals - Your referral url will be randomly inserted 3 times for surfers visiting the web site without a referral url.
2. 1 dollar for 1000 credits (x1) weekly
3. Monthly 1/2 ct ad to all
4. 25,000 Banner Impressions (monthly)
5. 500 1/4 ct Paid-To-Click (monthly)
6. Contest Emails / one-contest email to all 1 winner will receive .10 cents good for 7 days (monthly)
7. Contest Paid to Click / one contest Paid to click link to 1000 clicks winners receive .10 cents (monthly)
8. Payout at $7.00

Silver member fee is $30.00 for a Yearly Membership, $65 for a Lifetime Membership.

Bronze Membership
When you upgrade your free membership to a Bronze Membership, you will receive the following benefits:

1. Free Referrals - Your referral url will be randomly inserted 2 times for surfers visiting the web site without a referral url.
2. 1 dollar for 1000 credits (x1) weekly
3. Monthly 1/4 ct ad to all
4. 10,000 Banner Impressions (monthly)
5. 500 1/10 ct Paid-To-Click (monthly)
6. Contest Emails / one-contest email to all 1 winner will receive .10 cents good for 7 days (monthly)
7. Contest Paid to Click / one contest Paid to click link to 1000 clicks winners receive .10 cents (monthly)
8. Payout at $8.00

Bronze member fee is $20.00 for a yearly Membership, $40 for a Lifetime Membership.


Supporter Membership
When you upgrade your free membership to a Supporter Membership, you will receive the following benefits:

1. Free Referrals - Your referral url will be randomly inserted 1 times for surfers visiting the web site without a referral url.
2. 1 dollar for 1000 credits (x1) weekly
3. Monthly One - 1/10 cent to all
4. 1000 Banner Impressions (monthly)
5. 250 1/10 ct Paid-To-Click (monthly)
6. Contest Emails / one-contest email to all 1 winner will receive .10 cents good for 7 days (monthly)
7. Contest Paid to Click / one contest Paid to click link to 1000 clicks winners receive .10 cents (monthly)

Supporter member fee is $10 for a yearly Membership