Reparations and direct cash transfers seem like totally different things to me. GiveDirectly is about rich people giving to poor people; reparations are about (the descendants of) bad people giving to (the descendants of) their victims. Even if you believe in this sort of inter-generational blood debt and handwave aside the non-identity problem, there is the direction of payment will often diverge from GiveDirectly. For example, many of the descendants of slavers presumably remain in Africa and are quite poor, while the descendants of many of their victims now live in America and have significantly higher incomes.
Reparations and direct cash transfers seem like totally different things to me. GiveDirectly is about rich people giving to poor people; reparations are about (the descendants of) bad people giving to (the descendants of) their victims. Even if you believe in this sort of inter-generational blood debt and handwave aside the non-identity problem, there is the direction of payment will often diverge from GiveDirectly. For example, many of the descendants of slavers presumably remain in Africa and are quite poor, while the descendants of many of their victims now live in America and have significantly higher incomes.