You'll be amazed what 1 guy with a good script and/or coder can do. You can easily set up a service like this .
Ofcourse it will be a scam but a "safe" one. Since in the fine print (which most people don't read anyway), you can withhold their funds for any number of spurious reasons.
Of course it's possible. You need to select the right vehicle to get you there.
Selling a $10 ebook is unlikely to get you there.
Look at a recurring revenue model and you only have to set it up once and then maintain and tweak.
In fact I'm experimenting/investigating one such module right now...
None of the above answers will make you money. They're all incidental to making money.
To make real money you must provide VALUE for a specific group of people (market) who have a desire or need (preferably desperate) for your solution (product or service).
The Value your product or service...