The following is NOT TAX ADVICE. I only give tax advice to my tax clients. I am self employed.
I sell a few things online. I have since 1999. The threshhold for 2023 is $5000 (down from $20,000). I have alway kept a spreadsheet on my sales, cost of sales, selling commissions, and freight & postage, really just to know if I'm at least breaking even. Never sold a lot in a year.
With the $600 reporting threshhold in 2024, I am completing for 2023 an additional Schedule C for my "Online Sales Business." For the 2023 tax year I made a whopping $195.00 PROFIT, I wasn't close to the $5000 threshhold. I will file this every year now as a second business. Probably won't make money every year, but the losses will be on the Schedule-C. If everyone that receives a 1099 does this I expect there will more Schedule C's with losses than gains. Losses on additional Schedule Cs will reduce income tax. It will also reduce self employment tax.
Downside, there is a risk the IRS could deem it a "hobby" if too many years pass without a profit. "Hobby" losses are not deductible.
I'm also addng a third Schedule C for 2023 that will have a huge loss in year one, mainly due to equipment depreciation, large purchases of supplies and inventory. If you are a cash basis tax payer inventory can be expensed to cost of sales when purchased as opposed to when used, with certain limitations.
Just my ramblings. THIS IS NOT TAX ADVICE