I do not recommend working with YouTube. You will work on YouTube 2-3 years and at one point you to block spam for some reason or some other garbage and remove all your videos, and the money itself zagrebut. You can then bang your head against the wall, and the account is unlocked. So think 100 times before wasting your time and money on the YouTube channel. YouTube in the past. I do not recommend working with affiliate.
The difference between Amazon and EBay is that EBay (though still filled with new items) is seen as a used marketplace between individual parties, whereas Amazon (which is filled with offers for new and used merchandise from the 3rd parties) is viewed as a Wal-Mart-type superstore. As a consumer, this difference leads me to use Amazon, so it only makes sense to target on my own demographic.
Often, what happens is that we run into unscrupulous Internet Marketers (IMs) who have less-than altruistic intentions of extracting money from you rather than helping you to make it. However, this isn't something new. People have been falling for networking marketing, pyramid schemes, and affiliate marketing scams since before the start of the net.