Article talks that used clothing costs about the same as new clothing so there isn't a market for it. Similar to the e-waste issues that are starting.

https://www.bloomberg.com/view/articles/2018-01-15/no-one-wants-your-used-clothes-anymore

But a reminder that your local pet shelter still can use shirts without buttons (t-shirts or shirts you cut the buttons off), towels and blankets for pets.