As mentioned elsewhere on here, I used to be into online casino bonus hunting. Almost everyone I told about it rolled their eyes, laughed, told me that the house always wins, it was a scam, I'd never see my money again etc. etc. Only my missus and one of my best friends trusted that I knew what I was doing and worked with me to get involved.
Even when I was making £3,000 a month tax-free for doing nothing more than setting up autoplay on my laptop and letting it run overnight, most people still thought it was a big scam. Some that had moved on to accepting I was making easy money would then think it was beneath them or it would end in disaster eventually. There are a lot of people that live and die by the "if it's too good to be true..." maxim and hence it's only ever a small group that take the "easy" wins.