One for one (also known as "buy-one give-one") is a social entrepreneurship business model reputedly developed by Blake Mycoskie of TOMS Shoes, in which one needed item is given away for each item purchased.
[2] Based on the success of TOMS Shoes, other companies began following the business model.
Warby Parker began donating eyeglasses to people in need while companies like Soapbox Soaps and Two Degrees Food employ the model to help with poor hygiene and hunger.
[2] It also showed that market saturation and adoption by larger companies make it more difficult for consumers to differentiate between competing companies and also cause them to question the authenticity of the concept.
[2] It was also criticized by Fast Company as only being a band-aid in addressing social change and that companies use it as "selling ego boosts disguised as social change.