My web site "Using Win32 Functions in Visual FoxPro" offers paid content available through subscription.

Yesterday I had a subscriber, who paid with credit card on name of Carol Kim from Cali, Indiana, USA. Email carolkim@s.vnn.vn -- is it Vietnam?

Today this subscriber has been connecting, most of them practically simultaneously, from at least 14 IP addresses located in so distant areas as Urugway, Taiwan, Korea, St.Louis and Iran:
130.158.65.240
192.150.249.88
200.40.181.14
210.104.221.97
200.164.78.26
200.207.163.224
200.40.181.14
200.54.164.75
200.74.132.190
210.104.221.97
211.23.17.18
211.248.96.195
213.233.160.4
213.89.107.111
24.247.180.72
61.238.157.142
63.164.60.12
81.56.96.121

So what can it be?
(1) Someone who's able to forge IP addresses?
(2) Someone who has "enslaved" set of computers around the world
(3) A group of FoxPro developers a.k.a. hackers
(4) Real Carol Kim :)

Doesn't it look strange? Any ideas? Except informing the online payment service which I'm going to do asap.