I have gpu set to $1 and cpu to .65 cents. It was on that really low earning(.55 cents) for one gpu for the whole 25 minutes before switching. I have to manually select with cpu just to get it mining at .75 cents on NiceHash on cryptonightV7 for example). On another note I also had the app crash on me two days in a row when I was not home. Not sure what time it crashed but it did. Overnight it was fine.