Depending on the niche you've chosen and the skills you've learned, you might earn considerably more than $300.
Perhaps after 12 months, you'll be earning $500 to $1,000 a month from your site.
The checks keep coming in, month after month, even when you take a little vacation. You start telling friends how easy affiliate marketing is, and are puzzled when they're not convinced.
Of course, it's not really easy. It just seems easy after you've done the hard work.
...or the NON-payoff
If you've merely scanned the instruction manual and jumped right in without doing any research and built a "Make Money on the Internet" site, you'll probably earn very little. A search on Google for "make money" displays more than 4 million pages. If one of those is yours, you have a