Self employed

So does it mean I can be in business one year and not in the next? I just read this IRS article: 

 

https://www.irs.gov/newsroom/earning-side-income-is-it-a-hobby-or-a-business

 

And it's what I'm talking about meeting certain criteria to be considered a business. Making an extra $1000 to $2000 in a certain year for selling used items on ebay won't be enough to pay tax preparers and possibly tax lawyers.