Registered Infolinks in Aug, 2008 and got my first payment (USD109.16) today. Well, it’s not ideal but it’s better than nothing.
If you also have website or blog, and want to make some extra money, I recommend you read some more about Infolinks,

Infolinks presents the next generation of In-Text Advertising, leading the industry with the most relevant in-text advertising links and the highest revenue share – guaranteed.
• Quick and easy setup with no changes to your website
• Ads are tightly integrated with your content – no additional space required
• Free sign up with no commitments or risk

Of course, there are more than one contextual advertising solution for your website, for example, Kontera(I registered this before Infolinks, but I got even nothing, so I gave it up).

2008-09-02 11:32:36, A a new user bought Dreamhost hosting and used my invitations,
2009-01-01 00:54:26 $97 Rewards cashed out via paypal!

I have just Got five DreamHost Invitations, they are
996416962636
141569625873
974835518852(has been used)
753435841199(has been used)
460345399323
If you use one of them to buy Dreamhost hosting, you will save big money!
* You will get four (4) times the normal disk and bandwidth!
* If you choose our five-year plan, you’ll get $150 off!
* If you choose our ten-year plan, you’ll get $200 off!

Do not hesitate to visit https://signup.dreamhost.com/ and apply your hosting now.