Now before you run off and start signing up under every web hosting affiliate program you can find, let me tell you that it’s also one of the most competitive. You’d better have a game plan and some deep pockets or great resources before you decide to tackle this industry. These are the top on the list: DreamHost HostRocket TechnoHosting 1&1 Hosting among others..
Affilate program is an automated marketing program where a Web advertiser or merchant recruits webmasters to place the merchant's banner ads or buttons on their own Web site. Webmasters will receive a referral fee or commission from sales when the customer has clicked the affiliate link to get to the merchant's Web site Web site to perform the desired action, usually make a purchase or fill out a contact form. The most common types of affiliate programs include pay-per-click, pay-per-lead, and pay-per-sale.
My vote is for dailyrazor.com , great service and support and I earn good amount through affiliate program.
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I have earn over $400 from JustHost affiliate. I tried Hostgator but up to now I haven't been paid. I have to be careful to read their terms though. JustHost will pay no matter what as long as the buyer you're recommended makes the purchase but some other affiliates have certain rules which are very strict. So I would recommend JustHost, They pay much sooner as the revenue is easy
For me is aff.biz ... with midphase, vps.net etc. I got even 100$ per sale. However heard about 150$ commissions from other companies.