6m-7m thats about 10$ i could make that 10$ every 20 minutes of my work time...lmao
pshhh i lvl bio for 2 weeks and sinX for a week. i dont see the logic here
... hmmm people should know the value of grinding lmao.. 
Lol, you can't always expect to make x amount of money based on x amount of work. Sometimes, you may find yourself doing excessive work for small rewards. That's like this game; you can't expect to make much money out of it, but you can expect to have fun.
For example, at Skellington, even if you grinded hard to make five million zenies an hour, you're only really making around six dollars an hour if you convert it to ads.