"At least 70% of donated garments end up in Africa, according to Oxfam, a British charity that also sells used, donated clothes to the continent".
This was in the New York Times International Weekly, Oct 20, in an article about how various African countries are trying to phase out imports of second-hand clothing and shoes in favour of their own textile industries.
Kenya had to give up its plan to ban imports of used clothing from the USA for fear of retaliation in the form of lost textile exports, according to the article.
I've also seen comments on You Tube about how old clothes from the west are recycled in India -- boiled up and rewoven into cheap blankets that smell nasty and fall apart in months. The blankets go to refugees in camps.
I thought it was a good thing to donate used clothing to charity shops, but it seems it's not so!