Umm - that one slipped through the net - sorry! You’re right in that it means one client per IP address per proxy, but we actually had that restriction in place for Test 17 too - oops!
We really only meant to mention the fifth bullet point: that we tweaked the client rate-limiter to remove the restriction on the total number of clients a proxy will support. We’re expecting that we’ll be poking about in there again once we get a chance to assess the results of Test 18.
For now, it’s a bit of a balancing act trying to protect the network from “problem” clients while still giving the rest of the clients a decent service. For example, the change we made in this iteration means that a proxy node with ten connected clients will now accept an eleventh client rather than rejecting it (assuming it has a different IP address to the other ten). Great news for that eleventh guy, but the proxy’s throughput is now shared between eleven, so the original ten all experience a slightly reduced service.
Sorry for the fake news! The rest of the update is all absolutely 110% correct probably