Hi -- I see the zaps on our browser also. Our zap tester produces the error "the zap spec requires that the zap receipts be sent to the relays specified in the zap" -- sometimes in cases where your zap receipt *did* go to *some* relays, but might not have gone to the relays specified in the zap... which is what the spec requires. In practice, if you are sending zap receipts to well-known relays, that might be good enough.....
Discussion
Ya when testing we can see that it publishes on all open-relays and are blocked by paid relays.