I2P doesn't have exit nodes like Tor, so it's essentially the same thing as running a Tor relay from an outside perspective, with a few positive differences.
I2P is mainly an overlay network that routes traffic only inside the network. The upside is that providers won't ban your IP for participation if you run a node. I know that with Tor, many datacenters/CDNs don't care whether it's a relay or exit node and will blanket ban all known IPs of the network. You also won't attack someone on the clearnet or somehow participate as a scapegoat in clearnet crimes.
I've never heard about any consequences for running non-exit relays in Tor, though if you're in a country that strictly punishes usage of any anonymous technology, that might be risky anyway.
I2P has several commercial "outproxies" that proxy traffic to the usual internet, but that's not the intended usage and it's not enabled on typical users' routers.
UPD: Anyway, if you feel uncomfortable sharing others' traffic and want to only use it as a client, you can disable transit traffic completely in both Java and C++ implementations.
I2P is mainly an overlay network that routes traffic only inside the network. The upside is that providers won't ban your IP for participation if you run a node. I know that with Tor, many datacenters/CDNs don't care whether it's a relay or exit node and will blanket ban all known IPs of the network. You also won't attack someone on the clearnet or somehow participate as a scapegoat in clearnet crimes.
I've never heard about any consequences for running non-exit relays in Tor, though if you're in a country that strictly punishes usage of any anonymous technology, that might be risky anyway.
I2P has several commercial "outproxies" that proxy traffic to the usual internet, but that's not the intended usage and it's not enabled on typical users' routers.
UPD: Anyway, if you feel uncomfortable sharing others' traffic and want to only use it as a client, you can disable transit traffic completely in both Java and C++ implementations.