Question about Turn Key Web Biz

[Geek-9pm]

My Question about turn-key web stores. You know. Like on eBay or Amazon.

This not a recommendation  of any kind. 
It is a real honest question. 

Should I consider a turn key web site as a way to improve  my social security income?  I am not able to get a full-time or even a pert-time job at my age and with my heath issues.
But I see that some y people are doing on-line business. And then I see there some companies who offer  turn-key web stores.

I suspect these are likely ways to get the elderly invest money in dubious business ventures. But years ago I did sell some stuff of my on eBay.  So I am thinking.
 
Have any of you ever have any good things come from any kind of turn key web business? Was it all  very b ad?

Two examples:
https://www.youtube.com/watch?v=0wPdslmO120
https://www.youtube.com/watch?v=GG7KIToD2wc

Disclaimer. No way am I recommended anything. These were picked at random. I just want to know if you think they are all just a waste of time.

Thank you for your time. 

EDIT: Found two about drop shipping.
https://www.salehoo.com/learn-more
http://www.worldwidebrands.com/?kbid=32859

[BC_Programmer]

Sounds like a scam. Only way I can see it to be viable for somebody to constantly startup, and create turnkey businesses to sell to others who then get the rewards would be if those businesses are doomed to failure to begin with and there are no "rewards" to be had, and selling them nets a massive profit for the creator. Otherwise, they would be keeping the business!