You can't ask a social network to support ideas that involve violence and murders.
I know Luigi is a hero for many but it was an illegal action. You can think any monarchy is anacronyst nowadays, but you can't go and shoot any of those useless humans that think they can be called king or queen like we were living in mediaeval times
And remember that any insurance system is not that different from a national system, you can convert one into the other any time.
The problem is with shitty brains which can go and spread their shitty ideas either here or there. Since national systems can be so corrupted, it's ok to have a private way to clean them up from time to time.
the idea is not bad. Think you create your ecommerce site, list your products, and they are automatically listed in a huge marketplace.
The same could apply for bed and breakfast booking websites
With Amazon you pay that service if you consider that its prices are often higher than standard ecommerce sites.
You can say it's a very comfortable service, but try to think how many times you returned products that you considered really necessary...
I hosted it on a 1€/month vps at ionos.
An instance with multiple users actually, and it runs just great. Not a lot of space but hey, that's 12€ per year
Let me suggest you don't become too attached to a mainstream digital tool