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.