From their website:
The #BlackLivesMatter Official Store (#BLMShop) is a response to the demand from our supporters, allies, and organizers to offer authentic Black Lives Matter Global Network (BLM Global Network) merchandise that can both mark and commemorate our shared commitment to this movement. Apparel and other items offered in this store are carefully selected and creatively designed to reflect the unique brand of the BLM Global Network. In addition, the #BlackLivesMatter Official Store is intended to further amplify our message and uplift radical artists.
Proceeds from the sale of merchandise will fund our work to eradicate white supremacy and build local power to intervene in violence inflicted on Black communities by the state and vigilantes.
The #BlackLivesMatter Official Store will partner with designers, artists and influencers to offer our supporters various products to engage in the movement. By combating and countering acts of violence, creating space for Black imagination and innovation, and centering Black joy, we are winning immediate improvements in our lives.