Copied from a comment I just posted on Discord (might be useful for someone):

"If you do try suprnova you should realize that the "Round earnings est" takes a while to max out.  Once you leave things running for 6 hours or so you can estimate your daily payout there by looking up their "Est. Avg. Time per Round (Pool)" on the Statistics/Pool page.  Then figure out how many blocks the pool should get per day: 24 * 60 / "Est. Avg. Time per Round (Pool) (in minutes)".  For example right now they are estimated to get 5.18 blocks per day.  Then I just multiply my "Round earnings est" by those estimated blocks to determine how many coins I should make on average per day (assuming pool/network stats stay the same)."