I think there is similar service that works with amazon and it uses monero for payment, but I heard that service has some issues.
Maybe you should also include more privacy payment options in Zellix, including monero (if not already accepted).
Serving only US customers and 10% is a no go for me to try this service.
KYC wise, we have no requirements and that wont change.
I have had no KYC or fund tracing on btcpostage.com for coming on to 10 years and the same will apply to zellix.com
What happens in case if some order is not delivered or it comes damaged?
I take it you are not in the US?
As mentioned we are expanding and the 10% can easily be avoided with our membership.
I am not aware of anyone else that offers this service, do you have a link to the monero option you mentioned?
The only other ones I know of use gift cards or even fraud, its cheaper yes but as you mentioned it comes with its downsides.
We are doing this very official so returns, no shoes, damaged products and anything else are no problem at all we can get them replaced or refunded. Similar process as with amazon directly.