On my instructions that I got with the 1099k it states if the box that says third party network is checked they will not be reported, is that true?

So if my 1099k is for $50,000, I can claim up to $50,000 in losses, as long as I have the back up and it will go in Line 23. What does the 2% rule mean?

I was looking on IRS website and it said that I could claim the losses on #28 under other misc deductions, is that correct?