You make a few assumptions in your argument’s favor
Assumption 1 that is challenged.
Its like saying most don’t know about facebook, or phone apps, or google.
Of course once the word is out that the SAFE network they are using can have vaults at home and installed with a single click and supplying their account ID and it’ll earn them SAFEcoin, I can tell you all the school kids will be installing it at home. All the office workers will install it at home and attempt to do it at work too I bet.
Assumption 2 assumes the home user will not buy these too like they buy printers or phones or wifi routers or many other technology things they know nothing about their workings.
So no reason the home user cannot take advantage of the 50$ vault to which they add their USB drive.
And that still costs money, something the home user will not be paying much more of. And no labour costs either. Nor paying for fire alrams, burglar alarms, security, rates, aircon, etc
And every reason home users by their millions will outstrip the industry.
Oh and hae you thought that the 100’s of millions of home users will be accessing the internet backbone through 100s of ISP per country/region (10000’s of) as compared to the datacentres that have their large connections but very limited in number. So the datacentres will not be the sole able vault owner.