i think it's a good idea to check your stats frequently, not in every minute, but in every few hours, because in this line of business anything can happen
besides the earnings, most of the time there's unique hits, EPC etc. which can reveal a lot of things
just the most trivial example if you do social media, that accounts can get banned, you need to replace them, proxies can go down, you need to ask your proxy guy to check what's up, VPS can go down, bots can go down yadda, yadda, this all can cost you serious money, if you don't notice it in time, just one or two days later, so don't look at stats checking just as a waste of time, it helps you improve whatever you're doing and keeps you sharp, just don't go overboard with it