yeah, yeah, yeah. That's what all the gurus are telling you, aren't they?
People hear about worthelss courses, ebooks and diets that were bought by their friends all the time. That immediately pushes conversions down, due to disbelief.
Now, you have a ton of competing products already in the vertical. People with experience and tons of connections. People with tons of money, who can create better content than the average joe, create better copy, buy more advertsing and launch WAY bigger campaigns. People who can pay celebrities to push their product.
The money that is left in the vertical is for those people. Avarage joe doesn't have any edge on them. They will bring the conversions and affiliates will always chose them over you.
Now, on the affiliate side - buying adverising is increasingly consolidating space, where product owners buy huge chunks of the available inventory and use tools and services you've never heard of. If you are a big time affiliate, you can afford access to them too. If you are small time affiliate - tough luck for you.
Now this will consolidate more and more and product owners and their big partners will take more and more channels, pushing away smaller affiliates. Because that is what makes sense for them. When you have the money, connections and experience, you create barriers around your business, so other people can't take a chunk from you.
This will go on and go on until these shady(read scammy) products lose all credibility in the eyes of consumers, because that's what happens when you screw tons of people.
And now you are looking at very few products, pushed by very big organisations with exclusive deals of destribution by ad networks, large companies in the space and a few big time players that just have the connections.
Now... tell me more about how this isn't a dying space, please.