If I want to add to the site, I am asked to visit the Terms of Service page? This page does not exist. Why are there no conditions for service and how the person will defend himself and sue you if any problem occurs?
You have no chance for it.
He is using the API from stripe checkout and stripe clearly says in their ToS:
Quote
currency exchanges or dealers
.That is no real exchange, it doesn't even check the validity of your address, you can type anything there.
Second, the op had a previous website exmax(dot)us, a dead domain up for sale.