Is it easy to make money through internet marketing like eBay, Amazon, drop ship , affiliate marketing etc?:

Is it easy to make money through internet marketing like eBay, Amazon, drop ship , affiliate marketing etc?

Is it easy to make money through internet marketing,like eBay, Amazon, drop ship , affiliate marketing , auction etc ? Its work for any individual who sitting in any country and make sale and convert there dollars,yarn ,euro, in there home country currencies ? how much one normal individual can make money from such activity ?

Where can I find information on different types of internet marketing?:

Where can I find information on different types of internet marketing?

I’m looking for as much information as possible on as vast a range as I can find regarding internet marketing, such as click-through campaigns and Google adwords campaigns. If anyone can direct me to the most detailed and wide-ranging websites, I’d be much obliged.

Is a web development agency costly if you want to sell things and do affiliate marketing?:

Is a web development agency costly if you want to sell things and do affiliate marketing?

Am I better with just a web hosting site instead?