It would be less than 1% of their revenue. So imagine a programmer on $100k/y, who makes $600/y on a side hustle, that $600 cannot grow but needs to do extra ta

It would be less than 1% of their revenue. So imagine a programmer on $100k/y, who makes $600/y on a side hustle, that $600 cannot grow but needs to do extra tax paperwork, devote attention to it. And the customers of that hustle will leave if they sell the business on. At the same time they are on an upward trajectory at work and expect to get to $500k/y and are putting their focus into that.