Here in the UK, donating old/unwanted clothes to charity has been a thing for a long time, at least a decade.
Many supermarkets accept various kinds of recycling, and many have a large box for clothing, which goes to places like the Salvation Army. TBH, I've no idea what they do with it though.
There are also door-to-door collections, where a bag is put through your door, for collection a couple of days later - of course, anyone can do this, and there have been cases in the past of unscrupulous people claiming proceeds will go to charity, but instead pocketing all the money.
Donating used clothing and other things to Goodwill, Salvation Army, etc. has been a thing for many decades in the US. These days you also see a fair number of collection bins in parking lots for either clothing/shoes or books/videos. I don't know how much of what's donated just gets thrown out though; I suspect a fair bit.
Many supermarkets accept various kinds of recycling, and many have a large box for clothing, which goes to places like the Salvation Army. TBH, I've no idea what they do with it though.
There are also door-to-door collections, where a bag is put through your door, for collection a couple of days later - of course, anyone can do this, and there have been cases in the past of unscrupulous people claiming proceeds will go to charity, but instead pocketing all the money.