Making money online - My thoughts

Have you ever searched make money or something similar on google? You get about a billion results of people claiming to give you the best deals in the world like "invest $10 and earn $94023" and "buy this product now for $50 and make millions in profits" Now my mind tells me that there has to be a catch somewhere. Things like Google Adsense and Clickbank make a bit of sense but seriously, if we could make millions by investing $10 per person then i think we would've alleviated world poverty already. I mean the return is too massive to be true. If its such a good investment, why hasn't Donald Trump invested yet? I think there has got to be a scam or catch involved somewhere... and how much can you really make from these deals? If somethings costs u little, maby its worth a little....