That percentage is absolutely unreal, Kevin. WOW!
But actually, the IRS recently released a report on how they select people for audits. Self employment was one of the criteria, but especially if they report lots of deductions, repeat net losses, or clearly have a lifestyle not compatible with their income. The IRS really only looks at purchases over 10,000 dollars. They don't look at your average deposits and purchases unless they get a real red flag.