Hey there,
Of course! To get a better understanding on why most people do not end up making money online is better understood when looking at a sales funnel.
1) Lead Magnet (That free thing you giveaway to entice people to subscribe)
2) Trip-Wire product (Usually a product you sell between $10-$100) This separates the buyers from the non-buyers on your list.
3) High-end product. This is your big sale! This is where the money is to be made.
4) Upsell on high-end product. This is an offer for those individuals who want MVP status. They want the complete luxury experience you have to offer.
Now if you look at those 4 steps to a sales funnel and lets say 100 people were curious about internet marketing. Only 50 would actually take some sort of action creating their lead magnet and all the others would either be to lazy or think it's a scam.
Next spot where most people fall off is not being able to convert a subscriber to a customer. So now only 20/100 people can actually make $1 online by selling a small product.
After that we come to high-end sale. Most people who do end up selling their low tier product usually do just that. They don't try offering any high-end services because they don't think people will buy from them. These are the people that make just enough to quit their job or only make a few hundred dollars a month. This drops it down to around 5/100 people end up offering a high end service to their customers.
Finally, the high-end upsell. This is the bonus package. Maybe it's 1-on-1 coaching session or whatever you can add on top of your "Get all you need" product. Only around 1-2/100 people end up offering this to their high-end clients.
So as you can see the numbers drop pretty quickly. As what this has to do with if you can make money with clickbank? Of course you can.. but once you are in the groove and making decent money with clickbank you may want to move to create your higher end products to offer to your subscribers as well. If you don't have that kind of expertise to offer a high-end product to your customers, save up some money and hire someone who's an expert and tell them you need an exact step-by-step action plan for whatever your niche's problem is.
Hope this helped
Adam