We have, on rare occasion so far, paid the older kids for doing specific tasks - raking leaves, pulling weeds, etc - but it's only been when they get a wild idea about earning some extra cash. 

We are formulating a plan to make and sell muffins, but the discussion is ongoing.  

hodlpleb

Personal_Finance

Introducing Kids to Money and Bitcoin

I think the same with respect to household chores, they are activities that children must learn to do no matter what, without conditions or rewards, because they are responsibilities that any functional human being must carry out.  Only that I had seen that some parents "pay" their children to do "work" (not with respect to the home), for example: "I pay you to assist me in some tasks at the office."  But I repeat, your method seems extraordinary to me, I'm going to read the book.  thank you!