Just created an account on this, and found that they "conveniently" allow
you to add addresses from your Yahoo or MSN address books.
So Frank, rest assured that your "friends" who are in your yahoo address
book are doomed to getting SPAM from these guys, and their partners. Well,
of course their privacy policy says it all in any case:
<snip>
hi5 collects personal information when you register, when you use hi5, when
you visit hi5 pages or the pages of certain hi5 partners. hi5 may combine
information about you that we have with information we obtain from business
partners or other companies. Once you register with hi5 and sign in to our
services, you are not anonymous to us. hi5 collects information about your
transactions with us and with some of our business partners. hi5
automatically receives and records information on our server logs from your
browser.
Use of information
Profile information and photos are displayed to people who view your
profile. In order to provide useful information about social networks, we
may use your profile information and photos on the hi5 website and when we
send emails. Additionally, when you send email invitations to join hi5, we
may use your email address. When you click to view a member's profile, we
may show that member that you clicked to view their profile. If you wish
not be shown to members whose profiles you viewed, you can change this in
your privacy settings.
We provide the information to trusted partners who work on behalf of or
with hi5 under confidentiality agreements. These companies may use your
personal information to help hi5 communicate with you about offers from hi5
and our marketing partners. However, these companies do not have any
independent right to share this information.
</snip>
Have fun.
Bharath