ThredUP launched in Boston in 2009 as a place to swap outgrown children’s clothing with other parents. Today, people sell gently-used children’s, teens’, and women’s clothing directly to thredUP, and buy directly from thredUP. It’s now a giant online shop for quality used clothing. Clothes sent in are reviewed, measured, photographed and placed online for sale – or, if they don’t meet thredUP’s exacting standards, rejected. Sellers receive as much as 40% of the expected resale price. ThredUP has raised …