To reflect the vital role of donations in improving the living conditions of Angolans, the Foundation uses the names of important rivers in Angola to designate various donor categories:

"Kuanza" - $100,000 or more
"Cubango" - $20,000 or more
"Cuando' - $1,000 or more
"Kasai" - $100 or more
''Cunene'' - $20 or more

Corporate sponsors contributing $20,000 or more can be officially associated with a specific project and participate in STI's planning or implementation.

Individuals can become members of the Foundation by contributing a minimum of $100 a year per person or $150 as a couple. Such memberships entitle donors to one vote per person or two per couple at the Annual General Meeting of members.