Yes, it's still open. But the capacity to coinos got exhausted quickly, not just by SN. I ended up routing only about 90k sats from SN to coinos, and the rest was from other sources until the channel got exhausted.

I rebalanced the channel but paid about as many fees rebalancing as I made from routing. I then upped my fee rate and so far haven't routed anything at the higher fee rate.