Can you make lots of money from a small investment with clickbank? Absolutely!
"Is it really as simple as buying ppc advertising and watching my cash roll?" Absolutely not!
PPC advertising can deplete your budget literally in seconds if not done right. You need to research and understand PPC well before giving it a go.
Once you're comfortable with your knowledge, start with a test campaign using a very low budget per day. Monitor continuously.
You'll need to be testing your keywords and ads, among other variables.
Study demographic data - countries, gender, age groups etc... - who is buying and who is clicking but not buying.
As a general rule, assume you'll lose money in the first days of a PPC campaign and it can take weeks to find the right targeting for a consistently good ROI.
Please note that I'm not in any way trying to discourage you from using PPC. Many of our top affiliates are using PPC with extreme success, but it takes time and work to get the right combinations.
Mancar