Why would they increase the threat profile of an IP in any way at all? An exit node, sure, but a relay? What possible threat could a relay pose?
Due to a similar IP reputation service, I couldn't pay my taxes from home this year, just because I had run a non-exit Tor relay recently. It's a big problem.
ETA: I'd also strongly recommend not marking an IP address specially in any way just for having a non-exit relay -- from what I've seen, the clients of IP reputation vendors also don't understand the distinction, so they block both kinds if told about both kinds. It's an attractive nuisance.
Something doesn't seem correct to me about this...