I didn't even know that suprnova has an ETN pool, just switched my miners to it, let's see whether it's any good. The front-end is sluggish, but at least it's accepting my shares (both electroneum.space and hashparty aren't working for me at all right now).
Ok, it's been 18 hours since I switched my miners to suprnova, and it's not good. I'm supposed to get ~ 1000 ETN/day, and that's what I was getting from other pools. On Suprnova I've only got 550 ETN for 18 hours, so it's ~ 25-30% less than I should be getting. Looking at their block stats it seems that they're extremely "unlucky", 235.53% over the last 24 hours (with 100% being the expected number of shares for the corresponding difficulty). That's unacceptably high considering their pretty decent overall hashrate. I'm off to hashparty now.