There is no limit on the amount of money you can earn as an affiliate - It's all up to you and how much traffic and sales you generate to our offers.
Let's do a quick calculation using Miss Hosting as an example and only include Web Hosting sales.
Web Hosting = 100 % (12 months)
Domain = $1 Per Registered Domain
VPS = 15 %
If you send 15 customers to Miss Hosting that order a Web Hosting Ultimate package each you earn: $2.99 x 12 months = $36 x 15 = $540